The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A047463 (Bold, blue-underlined text is an addition; faded, red-underlined text is a ~~deletion~~.)
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A047463

Numbers that are congruent to {2, 4} mod 8.
(history; published version)

#25 by Charles R Greathouse IV at Thu Sep 08 08:44:57 EDT 2022

PROG

(MAGMAMagma) [ n: n in [2..234 by 2] | n mod 8 in [2, 4] ]; // Bruno Berselli, May 11 2011

Discussion

Thu Sep 08

08:44

OEIS Server: https://oeis.org/edit/global/2944

#24 by Michel Marcus at Sat Dec 18 04:13:18 EST 2021

STATUS

reviewed

approved

#23 by Joerg Arndt at Sat Dec 18 04:02:18 EST 2021

STATUS

proposed

reviewed

#22 by Amiram Eldar at Sat Dec 18 03:50:30 EST 2021

STATUS

editing

proposed

#21 by Amiram Eldar at Sat Dec 18 03:45:19 EST 2021

CROSSREFS

Union of A017089 and A017113.

#20 by Amiram Eldar at Sat Dec 18 03:34:37 EST 2021

MATHEMATICA

Select[Range[250], MemberQ[{2, 4}, Mod[#, 8]] &] (* Amiram Eldar, Dec 18 2021 *)

CROSSREFS

Cf. A014848.

#19 by Amiram Eldar at Sat Dec 18 03:32:24 EST 2021

FORMULA

Sum_{n>=1} (-1)^(n+1)/a(n) = Pi/16 + log(2)/8. - Amiram Eldar, Dec 18 2021

STATUS

approved

editing

#18 by Susanna Cuyler at Sun Jan 14 22:58:16 EST 2018

STATUS

proposed

approved

#17 by Jon E. Schoenfield at Sun Jan 14 20:01:34 EST 2018

STATUS

editing

proposed

#16 by Jon E. Schoenfield at Sun Jan 14 20:01:32 EST 2018

FORMULA

a(n) = 8*n - a(n-1) - 10, with a(1)=2. - _Vincenzo Librandi, _, Aug 06 2010

Contribution by From _Bruno Berselli, _, May 11 2011: (Start)

PROG

(MAGMA) [ n: n in [2..234 by 2] | n mod 8 in [2, 4] ]; // _Bruno Berselli, _, May 11 2011

AUTHOR

N. J. A. Sloane.

STATUS

approved

editing