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A157071 Number of integer sequences of length n+1 with sum zero and sum of absolute values 44 0
2, 132, 4842, 124410, 2468160, 39944058, 546468188, 6480461988, 67871267730, 636929126680, 5418075931842, 42175511270802, 302809501559292, 2018756213756730, 12569156781338280, 73453463921029288, 404681030359774038 (list; graph; refs; listen; history; internal format)
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 * A174585 A186194 A099682

Adjacent sequences:  A157068 A157069 A157070 * A157072 A157073 A157074

KEYWORD

nonn

AUTHOR

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

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Last modified February 16 13:02 EST 2012. Contains 205909 sequences.