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A157073 Number of integer sequences of length n+1 with sum zero and sum of absolute values 48 0
2, 144, 5762, 161480, 3493730, 61651128, 919453346, 11883194148, 135595653690, 1385919151540, 12835654787802, 108738668285884, 849286949294602, 6156408373152940, 41657479594194090, 264432781857156298 (list; graph; refs; listen; history; internal format)
OFFSET

1,1

FORMULA

a(n)=T(n,24); 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: A115890 A101827 A163275 * A103207 A093002 A074319

Adjacent sequences:  A157070 A157071 A157072 * A157074 A157075 A157076

KEYWORD

nonn

AUTHOR

R. H. Hardin (rhhardin(AT)att.net) Feb 22 2009

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Last modified February 15 04:23 EST 2012. Contains 205694 sequences.