The On-Line Encyclopedia of Integer Sequences (OEIS)

Revisions by Hugo Pfoertner (See also Hugo Pfoertner's wiki page
and changes approved by Hugo Pfoertner)

(Bold, blue-underlined text is an addition; faded, red-underlined text is a ~~deletion~~.)
Showing entries 1-10 | older changes

A199401

Decimal expansion of constant Product_{p>=3} (1 - (-1)^((p-1)/2)/(p-1)). Hardy-Littlewood constant of x^2 + 1.
(history; published version)

#35 by Hugo Pfoertner at Tue Nov 26 20:01:58 EST 2024

STATUS

proposed

reviewed

A331941

Hardy-Littlewood constant for the polynomial x^2 + 1.
(history; published version)

#12 by Hugo Pfoertner at Tue Nov 26 20:00:32 EST 2024

STATUS

editing

proposed

#11 by Hugo Pfoertner at Tue Nov 26 20:00:16 EST 2024

FORMULA

Equals A199401/2. - ~~~

#10 by Hugo Pfoertner at Tue Nov 26 19:59:39 EST 2024

FORMULA

C = (1/2)*Product_{p=primes} (1 - Kronecker(-4,p)/(p - 1)).

Equals A199401/2. - ~~~

CROSSREFS

Cf. A002496, A005574, A083844, A199401, A206709, A221712.

STATUS

proposed

editing

A340724

Decimal expansion of Gamma(7/10).
(history; published version)

#15 by Hugo Pfoertner at Tue Nov 26 15:35:07 EST 2024

STATUS

proposed

reviewed

A378167

Differences between adjacent terms of A076467 that correspond to the locations described by A378166.
(history; published version)

#7 by Hugo Pfoertner at Tue Nov 26 03:52:38 EST 2024

STATUS

editing

proposed

A378166

Terms c = A076467(k) such that the distinct prime factors of b = A076467(k-1) and of c-b are subsets of the prime factors of c, i.e., rad(c)/rad((c-b)*b*c) = 1.
(history; published version)

#11 by Hugo Pfoertner at Tue Nov 26 03:52:11 EST 2024

STATUS

editing

proposed

#10 by Hugo Pfoertner at Tue Nov 26 03:51:57 EST 2024

COMMENTS

a(12) > 2*10^26.

A378167

Differences between adjacent terms of A076467 that correspond to the locations described by A378166.
(history; published version)

#6 by Hugo Pfoertner at Mon Nov 25 01:51:53 EST 2024

DATA

8, 32, 343, 17576, 65610000, 11329982936, 26102469128, 315404039943, 152838610998696, 7327416190396311, 146668341275463896

STATUS

approved

editing

A378166

Terms c = A076467(k) such that the distinct prime factors of b = A076467(k-1) and of c-b are subsets of the prime factors of c, i.e., rad(c)/rad((c-b)*b*c) = 1.
(history; published version)

#9 by Hugo Pfoertner at Mon Nov 25 01:50:20 EST 2024

DATA

16, 64, 2744, 474552, 157529610000, 407165596771032, 1491025241529616, 173903694695292024, 661905356066769705912, 14918256451377811247508792, 19801061641727872277815512