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A217144 Alternating sums of squares of Bell numbers (A000110). 1
1, 0, 4, 21, 204, 2500, 38709, 730420, 16409180, 430786429, 13019414196, 447437830704, 17306961847705, 746907935199264, 35695643204860420, 1876878693983656605, 107956500727342113004, 6758630146906528885412, 458470139353155531447869 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

LINKS

Table of n, a(n) for n=0..18.

FORMULA

a(n) = sum((-1)^(n-k)*Bell(k)^2, k=0..n).

PROG

(Maxima) makelist(sum((-1)^(n-k)*belln(k)^2, k, 0, n), n, 0, 30);

CROSSREFS

Cf. A000110, A005001, A087650, A217143.

Sequence in context: A267988 A041667 A286883 * A132684 A032074 A197662

Adjacent sequences:  A217141 A217142 A217143 * A217145 A217146 A217147

KEYWORD

nonn

AUTHOR

Emanuele Munarini, Sep 27 2012

STATUS

approved

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Last modified October 19 16:17 EDT 2019. Contains 328223 sequences. (Running on oeis4.)