id:A157067 - OEIS Search Results

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Number of integer sequences of length n+1 with sum zero and sum of absolute values 36

+0
1

2, 108, 3242, 68190, 1107920, 14692734, 164826956, 1604095524, 13799638910, 106481351240, 745616925614, 4783532975546, 28342922553764, 156153427053890, 804648531335960, 3897769097766104, 17828728267167326, 77310179609631564 (list; graph; listen)

	OFFSET	`1,1`
	FORMULA	`a(n)=T(n,18); T(n,k)=sum({i=1..n}binomial(n+1,i)binomial(k-1,i-1)binomial(n-i+k,k))`
	CROSSREFS	`A103881 A156554` `Sequence in context: A139887 A156502 A111456 this_sequence A023281 A042457 A062656` `Adjacent sequences: A157064 A157065 A157066 this_sequence A157068 A157069 A157070`
	KEYWORD	`nonn`
	AUTHOR	`Ron Hardin (rhhardin(AT)att.net) Feb 22 2009`

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Last modified December 5 08:23 EST 2009. Contains 170348 sequences.

AT&T Labs Research