The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A047406 (Bold, blue-underlined text is an addition; faded, red-underlined text is a ~~deletion~~.)
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A047406

Numbers that are congruent to {4, 6} mod 8.
(history; published version)

#42 by Peter Luschny at Sat Sep 03 08:50:11 EDT 2022

STATUS

reviewed

approved

#41 by Michel Marcus at Sat Sep 03 04:02:55 EDT 2022

STATUS

proposed

reviewed

#40 by David Lovler at Fri Sep 02 22:01:56 EDT 2022

STATUS

editing

proposed

#39 by David Lovler at Fri Sep 02 02:28:02 EDT 2022

LINKS

David Lovler, <a href="/A047406/b047406.txt">Table of n, a(n) for n = 1..1000</a>

FORMULA

G.f. : 2*x*(2+x+x^2) / ( (1+x)*(x-1)^2 ). - R. J. Mathar, Oct 08 2011

E.g.f.: 2*(1 + 2*x*exp(x) - cosh(x)). - David Lovler, Sep 02 2022

STATUS

approved

editing

#38 by Peter Luschny at Sun Dec 19 04:32:04 EST 2021

STATUS

proposed

approved

#37 by Michel Marcus at Sun Dec 19 02:26:16 EST 2021

STATUS

editing

proposed

#36 by Michel Marcus at Sun Dec 19 02:26:14 EST 2021

CROSSREFS

Cf. A042964.

STATUS

proposed

editing

#35 by Amiram Eldar at Sun Dec 19 01:57:42 EST 2021

STATUS

editing

proposed

#34 by Amiram Eldar at Sun Dec 19 01:37:13 EST 2021

FORMULA

From _Wesley Ivan Hurt, _, May 18 2013: (Start)

#33 by Amiram Eldar at Sun Dec 19 01:36:43 EST 2021

MATHEMATICA

Select[Range[230], MemberQ[{4, 6}, Mod[#, 8]] &] (* Amiram Eldar, Dec 19 2021 *)

CROSSREFS

Union of A017113 and A017137.