A154381 - OEIS

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A154381

Row sums of Bell related number triangle A154380.

1

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

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OFFSET

0,2

COMMENTS

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

LINKS

Table of n, a(n) for n=0..21.

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, A000178, A129247, A154380.

Sequence in context: A348351 A150134 A059279 * A150135 A150136 A195186

Adjacent sequences: A154378 A154379 A154380 * A154382 A154383 A154384

KEYWORD

easy,nonn

AUTHOR

Paul Barry, Jan 08 2009

STATUS

approved