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A090319 Fifth column (k=4) of triangle A084938. 1
1, 4, 14, 52, 217, 1040, 5768, 36992, 272584, 2285184, 21550656, 226071744, 2611146384, 32911082496, 449243785728, 6598780563456, 103734755882496, 1737181702840320, 30866291090657280, 579859321408266240 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

COMMENTS

columns, for k = 0, 1, 2, 3 : A000007, A000142, A003149, A090595.

LINKS

Table of n, a(n) for n=0..19.

FORMULA

a(n) = Sum_{k=0..n} A090595(k)*(n-k)! . a(n) = Sum_{a+b+c+d = n} a!*b!*c!*d! . a(n) = Sum_{k=0..n} A003149(k)*A003149(n-k) . G.f.: (Sum_{k>=0} k!*x^k )^4.

CROSSREFS

Cf. A084938.

Sequence in context: A308023 A149489 A125783 * A295518 A047118 A017948

Adjacent sequences:  A090316 A090317 A090318 * A090320 A090321 A090322

KEYWORD

easy,nonn

AUTHOR

Philippe Deléham, Feb 05 2004

STATUS

approved

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Last modified May 24 06:53 EDT 2019. Contains 323529 sequences. (Running on oeis4.)