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URL: https://oeis.org/A171700

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A171700

Triangle T : T(n,k)= A007318(n,k)*a(n-k) with a(0)=0 and a(n)= A077957(n-1) for n>0.

0

0, 1, 0, 0, 2, 0, 2, 0, 3, 0, 0, 8, 0, 4, 0, 4, 0, 20, 0, 5, 0, 0, 24, 0, 40, 0, 6, 0, 8, 0, 84, 0, 70, 0, 7, 0, 0, 64, 0, 224, 0, 112, 0, 8, 0, 16, 0, 288, 0, 504, 0, 168, 0, 9, 0, 0, 160, 0, 960, 0, 1008, 0, 240, 0, 10, 0

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OFFSET

0,5

COMMENTS

Diagonal sums : A001353(n+1) alternating with zeros.

LINKS

Table of n, a(n) for n=0..65.

FORMULA

Sum_{k, 0<=k<=n} T(n,k)*x^k = A077957(n-1), A000129(n), A007070(n-1), A081179(n), A081180(n), A081182(n), A081183(n), A081184(n), A081185(n), A153593(n) for x = 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 respectively.

EXAMPLE

Triangle begins : 0 ; 1,0 ; 0,2,0 ; 2,0,3,0 ; 0,8,0,4,0 ; 4,0,20,0,5,0 ; ...

CROSSREFS

Sequence in context: A391655 A278520 A239246 * A162660 A393312 A324848

Adjacent sequences: A171697 A171698 A171699 * A171701 A171702 A171703

KEYWORD

nonn,tabl

AUTHOR

Philippe Deléham, Dec 15 2009

STATUS

approved