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A032309 "EFK" (unordered, size, unlabeled) transform of 2,4,6,8,... 0
2, 4, 14, 20, 50, 112, 190, 328, 666, 1340, 2038, 3740, 5954, 10792, 19542, 30048, 48290, 80164, 124694, 204484, 347610, 515184, 810750, 1240296, 1932722, 2887820, 4557838, 7126652, 10463330, 15768168, 23499934 (list; graph; refs; listen; history; internal format)
OFFSET

1,1

LINKS

C. G. Bower, Transforms (2)

FORMULA

G.f.: prod(k=1..inf) (1+2*k*x^k).

CROSSREFS

Sequence in context: A054600 A077570 A032398 * A008519 A071865 A127596

Adjacent sequences:  A032306 A032307 A032308 * A032310 A032311 A032312

KEYWORD

nonn

AUTHOR

Christian G. Bower (bowerc(AT)usa.net)

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Last modified February 16 17:48 EST 2012. Contains 205939 sequences.