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A157068 Number of integer sequences of length n+1 with sum zero and sum of absolute values 38. 2
2, 114, 3612, 80180, 1374690, 19234194, 227605448, 2335932504, 21186110970, 172295622730, 1271112537684, 8588601364668, 53573492643034, 310601807143530, 1683493452034320, 8573748834211984, 41210997268585158, 187693442844729174, 812839595630249540 (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,19); 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: A224871 A230471 A140986 * A008271 A209184 A065670

Adjacent sequences:  A157065 A157066 A157067 * A157069 A157070 A157071

KEYWORD

nonn

AUTHOR

R. H. Hardin Feb 22 2009

STATUS

approved

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Last modified September 27 07:28 EDT 2021. Contains 347673 sequences. (Running on oeis4.)