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A157062 Number of integer sequences of length n+1 with sum zero and sum of absolute values 26 1
2, 78, 1692, 25740, 302850, 2912910, 23744840, 168278760, 1056789450, 5968878630, 30684132468, 144977296932, 634756203018, 2593322651430, 9946019437200, 35995371261360, 123490242018990, 403237594259010, 1257743358034100, 3759426449644740, 10799525727846702 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

T. D. Noe, Table of n, a(n) for n = 1..1000

FORMULA

a(n)=T(n,13); T(n,k)=sum({i=1..n}binomial(n+1,i)*binomial(k-1,i-1)*binomial(n-i+k,k))

CROSSREFS

Cf. A103881, A156554.

Sequence in context: A124456 A183578 A184965 * A008273 A197101 A166052

Adjacent sequences:  A157059 A157060 A157061 * A157063 A157064 A157065

KEYWORD

nonn

AUTHOR

R. H. Hardin Feb 22 2009

STATUS

approved

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Last modified June 18 18:23 EDT 2013. Contains 226355 sequences.