The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A154381 (Bold, blue-underlined text is an addition; faded, red-underlined text is a ~~deletion~~.)
Showing all changes.

A154381

Row sums of Bell related number triangle A154380.
(history; published version)

#4 by Wesley Ivan Hurt at Sat Sep 03 22:39:47 EDT 2022

STATUS

editing

approved

#3 by Wesley Ivan Hurt at Sat Sep 03 22:39:38 EDT 2022

COMMENTS

a(n) = 2*A129247(n), n>0. Hankel transform is 2^n*A000178(n).

CROSSREFS

Cf. A000110, A000178, A129247, A154380.

STATUS

approved

editing

#2 by Russ Cox at Fri Mar 30 18:59:22 EDT 2012

AUTHOR

_Paul Barry (pbarry(AT)wit.ie), _, Jan 08 2009

Discussion

Fri Mar 30

18:59

OEIS Server: https://oeis.org/edit/global/287

#1 by N. J. A. Sloane at Fri Feb 27 03:00:00 EST 2009

NAME

Row sums of Bell related number triangle A154380.

DATA

1, 2, 6, 20, 72, 276, 1120, 4804, 21796, 104784, 534788, 2901580, 16742440, 102654356, 667519492, 4590552960, 33278208004, 253436345340, 2020974497112, 16823488830836, 145798111066964, 1312272490908464

OFFSET

0,2

COMMENTS

a(n)=2*A129247(n), n>0. Hankel transform is 2^n*A000178(n).

FORMULA

G.f.: 1/(1-2x/(1-x/(1-x/(1-2x/(1-x/(1-3x/(1-x/(1-4x/(1-... (continued fraction).

CROSSREFS

Cf. A000110.

KEYWORD

easy,nonn

AUTHOR

Paul Barry (pbarry(AT)wit.ie), Jan 08 2009

STATUS

approved