The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A099546 (Bold, blue-underlined text is an addition; faded, red-underlined text is a ~~deletion~~.)
Showing entries 1-10 | older changes

A099546

Odd part of n modulo 5.
(history; published version)

#12 by OEIS Server at Thu Aug 29 09:16:13 EDT 2024

LINKS

Amiram Eldar, <a href="/A099546/b099546_1.txt">Table of n, a(n) for n = 1..10000</a>

#11 by Michael De Vlieger at Thu Aug 29 09:16:13 EDT 2024

STATUS

reviewed

approved

Discussion

Thu Aug 29

09:16

OEIS Server: Installed first b-file as b099546.txt.

#10 by Joerg Arndt at Thu Aug 29 06:06:07 EDT 2024

STATUS

proposed

reviewed

#9 by Amiram Eldar at Thu Aug 29 03:34:21 EDT 2024

STATUS

editing

proposed

#8 by Amiram Eldar at Thu Aug 29 03:24:33 EDT 2024

LINKS

Amiram Eldar, <a href="/A099546/b099546_1.txt">Table of n, a(n) for n = 1..10000</a>

#7 by Amiram Eldar at Thu Aug 29 03:24:05 EDT 2024

FORMULA

a(n) = A010874(A000265(n)).

Asymptotic mean: Limit_{m->oo} (1/m) * Sum_{k=1..m} a(k) = 2. - Amiram Eldar, Aug 29 2024

MATHEMATICA

a[n_] := Mod[n / 2^IntegerExponent[n, 2], 5]; Array[a, 100] (* Amiram Eldar, Aug 29 2024 *)

PROG

(PARI) a(n) = (n>>valuation(n, 2))%5 \\Charles R Greathouse IV, May 14 2014

CROSSREFS

Equals A010874( A000265(n) ).

Cf. A000265, A010874.

STATUS

approved

editing

#6 by Charles R Greathouse IV at Wed May 14 01:33:13 EDT 2014

STATUS

editing

approved

#5 by Charles R Greathouse IV at Wed May 14 01:33:11 EDT 2014

KEYWORD

nonn,changed,easy

STATUS

approved

editing

#4 by Charles R Greathouse IV at Wed May 14 01:32:53 EDT 2014

STATUS

editing

approved

#3 by Charles R Greathouse IV at Wed May 14 01:32:47 EDT 2014

PROG

(PARI) (n>>valuation(n, 2))%5 \\Charles R Greathouse IV, May 14 2014

STATUS

approved

editing