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A157063 Number of integer sequences of length n+1 with sum zero and sum of absolute values 28 0
2, 84, 1962, 32130, 406800, 4208610, 36881420, 280819260, 1893408750, 11472968760, 63221641758, 319917948246, 1498750896708, 6545498596110, 26808012135000, 103501142484360, 378407481456870, 1315394383751460 (list; graph; refs; listen; history; internal format)
OFFSET

1,1

FORMULA

a(n)=T(n,14); 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: A099373 A169601 A205643 * A181119 A157315 A078166

Adjacent sequences:  A157060 A157061 A157062 * A157064 A157065 A157066

KEYWORD

nonn

AUTHOR

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

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Last modified February 15 23:53 EST 2012. Contains 205860 sequences.