id:A157070 - OEIS Search Results

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Number of integer sequences of length n+1 with sum zero and sum of absolute values 42

+0
1

2, 126, 4412, 108220, 2049770, 31674678, 413820584, 4687156248, 46894786710, 420487598410, 3418440803052, 25437258929836, 174630760523102, 1113521228343010, 6633053884912560, 37097838553993648, 195668363575483134 (list; graph; listen)

	OFFSET	`1,1`
	FORMULA	`a(n)=T(n,21); 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: A123006 A028481 A049659 this_sequence A064070 A139904 A167414` `Adjacent sequences: A157067 A157068 A157069 this_sequence A157071 A157072 A157073`
	KEYWORD	`nonn`
	AUTHOR	`Ron Hardin (rhhardin(AT)att.net) Feb 22 2009`

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Last modified November 29 12:46 EST 2009. Contains 167659 sequences.

AT&T Labs Research