id:A124135 - OEIS Search Results

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a(n)=((-1)^n/6)*sum_{i1+i2+i3+i4=2n} ((2*n)!/(i1! i2! i3! i4!))*B(i1+i2+i3) where B are the Bernoulli numbers.

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0, 0, 3, 46, 1041, 32592, 1375919, 75858738, 5309829837, 460680712084, 48552875077995, 6111752613274230, 905772678574995593, 156116663818415074776, 30964395850928510817831 (list; graph; listen)

	OFFSET	`1,3`
	FORMULA	`a(n)=(-1)^(n+1){ (9^n/4-4^n+3/4)B(2n)+1/6}`
	PROGRAM	`(PARI) a(n)=(-1)^(n+1)((9^n/4-4^n+3/4)bernfrac(2*n)+1/6)`
	CROSSREFS	`Sequence in context: A037105 A059624 A119401 this_sequence A000576 A128109 A159246` `Adjacent sequences: A124132 A124133 A124134 this_sequence A124136 A124137 A124138`
	KEYWORD	`nonn`
	AUTHOR	`Benoit Cloitre (benoit7848c(AT)orange.fr), Nov 30 2006`

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Last modified December 7 23:50 EST 2009. Contains 170430 sequences.

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