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A065954 Nearest integer to (-1)^n*n!*(E(n,2)-E(n,1)*E(n-1,1)) where E(n,x) = Sum_{k=0..n} (-1)^k*x^k/k!. 0
1, 2, 3, 5, 9, 15, 26, 48, 87, 160, 296, 551, 1032, 1941, 3663, 6936, 13171, 25076, 47853, 91515, 175351, 336586, 647131, 1246070, 2402691, 4638908, 8967212, 17353538, 33618332, 65191863, 126535914, 245818071, 477938270, 929968028 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..34.

EXAMPLE

1, 2, 3, 5, 17/2, 89/6, 211/8, 1903/40, 62473/720, ...

CROSSREFS

Cf. A065952-A065956.

Sequence in context: A185649 A005169 A129852 * A067847 A190138 A273905

Adjacent sequences:  A065951 A065952 A065953 * A065955 A065956 A065957

KEYWORD

nonn

AUTHOR

N. J. A. Sloane, Dec 08 2001

STATUS

approved

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Last modified December 9 14:26 EST 2016. Contains 278971 sequences.