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A081197 Diagonal sums of A081130. 1
1, 1, 4, 13, 44, 162, 643, 2724, 12259, 58423, 293902, 1555743, 8640526, 50222288, 304792741, 1927313470, 12673784445, 86517541197, 612134881624, 4482215342305, 33919417267456, 264951302794510, 2133720505175351 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

LINKS

Table of n, a(n) for n=0..22.

FORMULA

a(n)=Sum{k=0..n, k^(n-k) Binomial(n-k+2, 2)}.

MAPLE

A081197 := proc(n)

    add(k^(n-k)*binomial(n-k+2, 2), k=0..n) ;

end proc: # R. J. Mathar, Feb 13 2015

CROSSREFS

Sequence in context: A045652 A149430 A124463 * A005490 A174299 A285188

Adjacent sequences:  A081194 A081195 A081196 * A081198 A081199 A081200

KEYWORD

easy,nonn

AUTHOR

Paul Barry, Mar 11 2003

STATUS

approved

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Last modified September 29 16:13 EDT 2020. Contains 337432 sequences. (Running on oeis4.)