The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A012244 (Bold, blue-underlined text is an addition; faded, red-underlined text is a ~~deletion~~.)
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A012244

a(n+2) = (2n+3)*a(n+1) + (n+1)^2*a(n), a(0) = 1, a(1) = 1.
(history; published version)

#45 by Vaclav Kotesovec at Sat Feb 18 03:25:30 EST 2017

FORMULA

a(n) ~ (1+sqrt(2))^(n+1/2) * n^n / (2^(1/4) * exp(n)). - Vaclav Kotesovec, Feb 18 2017

#44 by Vaclav Kotesovec at Sat Feb 18 03:20:22 EST 2017

LINKS

K. S. Brown, <a href="http://www.mathpages.com/home/kmath381.htm">Integer Sequences Related To PI</a> [broken link]

STATUS

approved

editing

#43 by Bruno Berselli at Mon Oct 31 10:20:21 EDT 2016

STATUS

reviewed

approved

#42 by Joerg Arndt at Mon Oct 31 10:09:43 EDT 2016

STATUS

proposed

reviewed

#41 by Wesley Ivan Hurt at Mon Oct 31 09:39:29 EDT 2016

STATUS

editing

proposed

#40 by Wesley Ivan Hurt at Mon Oct 31 09:35:42 EDT 2016

NAME

a(n+2) = (2n+3) *a(n+1) + (n+1)^2 *a(n), a(0) = 1, a(1) = 1.

STATUS

proposed

editing

Discussion

Mon Oct 31

09:39

Wesley Ivan Hurt: To differentiate this with A054765 and A054766.

#39 by Peter Bala at Mon Oct 31 08:50:45 EDT 2016

STATUS

editing

proposed

#38 by Peter Bala at Mon Oct 31 08:45:37 EDT 2016

CROSSREFS

Cf. A089975, A190392, A054765, A054766.

STATUS

approved

editing

#37 by Joerg Arndt at Wed Aug 19 05:50:26 EDT 2015

STATUS

proposed

approved

#36 by Michel Marcus at Wed Aug 19 05:15:40 EDT 2015

STATUS

editing

proposed