id:A157071 - OEIS Search Results

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Number of integer sequences of length n+1 with sum zero and sum of absolute values 44

+0
1

2, 132, 4842, 124410, 2468160, 39944058, 546468188, 6480461988, 67871267730, 636929126680, 5418075931842, 42175511270802, 302809501559292, 2018756213756730, 12569156781338280, 73453463921029288, 404681030359774038 (list; graph; listen)

	OFFSET	`1,1`
	FORMULA	`a(n)=T(n,22); 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: A080282 A131931 A020524 this_sequence A099682 A135759 A014315` `Adjacent sequences: A157068 A157069 A157070 this_sequence A157072 A157073 A157074`
	KEYWORD	`nonn`
	AUTHOR	`Ron Hardin (rhhardin(AT)att.net) Feb 22 2009`

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Last modified December 8 08:31 EST 2009. Contains 170430 sequences.

AT&T Labs Research