The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A008851 (Bold, blue-underlined text is an addition; faded, red-underlined text is a ~~deletion~~.)
Showing entries 1-10 | older changes

A008851

Congruent to 0 or 1 mod 5.
(history; published version)

#76 by Giovanni Resta at Wed Oct 12 05:20:21 EDT 2022

STATUS

reviewed

approved

#75 by Michel Marcus at Wed Oct 12 02:21:06 EDT 2022

STATUS

proposed

reviewed

#74 by Amiram Eldar at Wed Oct 12 02:05:40 EDT 2022

STATUS

editing

proposed

#73 by Amiram Eldar at Wed Oct 12 02:04:42 EDT 2022

REFERENCES

L. E. Dickson, History of the Theory of Numbers, I, p. 459.

#72 by Amiram Eldar at Wed Oct 12 02:03:04 EDT 2022

REFERENCES

L. E. Dickson, History of Theory of Numbers, I, p. 459.

#71 by Amiram Eldar at Wed Oct 12 02:01:54 EDT 2022

FORMULA

Sum_{n>=2} (-1)^n/a(n) = sqrt(1+2/sqrt(5))*Pi/10 + log(phi)/(2*sqrt(5)) + log(5)/4, where phi is the golden ratio (A001622). - Amiram Eldar, Oct 12 2022

CROSSREFS

Cf. A001622, A003226, A045953, A046831, A046851, A086457.

STATUS

approved

editing

#70 by Kevin Ryde at Tue Oct 11 00:46:27 EDT 2022

STATUS

reviewed

approved

#69 by Michel Marcus at Tue Oct 11 00:24:37 EDT 2022

STATUS

proposed

reviewed

#68 by David Lovler at Tue Oct 11 00:07:53 EDT 2022

STATUS

editing

proposed

#67 by David Lovler at Mon Oct 10 23:53:44 EDT 2022

FORMULA

a(n) = 5*n - a(n-1) - 4 (with a(0)9, n >=0) 2. - Vincenzo Librandi, Nov 18 2010 [Corrected for offset by _David Lovler_, Oct 10 2022]

STATUS

proposed

editing