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A115278 Number of partitions of {1,...,2*n} into even sized blocks such that no block size is repeated. 1
1, 1, 1, 16, 29, 256, 14422, 49141, 490429, 10758400, 1797335306, 9458619391, 133756636598, 2528529510391, 137864810180749, 53441183229799381, 410251032050409469, 7615997734377068128, 167055180095977694194 (list; graph; refs; listen; history; internal format)
OFFSET

0,4

FORMULA

E.g.f.: B(x) of b(n) where b(2*n)=a(n), b(2*n+1)=0. B(x)=Product {m >= 1} (1+x^(2*m)/(2*m)!).

CROSSREFS

Cf. A005046, A007837, A032310, A115277.

Sequence in context: A206259 A064803 A054314 * A064634 A183372 A145581

Adjacent sequences:  A115275 A115276 A115277 * A115279 A115280 A115281

KEYWORD

nonn

AUTHOR

Christian G. Bower (bowerc(AT)usa.net), Jan 18 2006

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Last modified February 17 00:09 EST 2012. Contains 205978 sequences.