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A093542 Antidiagonal sums of square array A093541, in which column (k+1) equals the self-convolution of row k. 2
1, 2, 4, 9, 24, 76, 284, 1244, 6342, 37527, 257802, 2058644, 19145230, 207751462, 2634249124, 39067322628, 677908600818, 13763069607754, 326806505773540, 9071727194243794 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

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

PROG

(PARI) T(n, k)=if(n<0 || k<0, 0, if(n==0 || k==0, 1, sum(i=0, n, T(k-1, i)*T(k-1, n-i)))); a(n)=sum(k=0, n, T(n-k, k))

CROSSREFS

Cf. A093541, A093543.

Sequence in context: A141824 A005001 A091151 * A301927 A000667 A131351

Adjacent sequences:  A093539 A093540 A093541 * A093543 A093544 A093545

KEYWORD

nonn

AUTHOR

Paul D. Hanna, Mar 30 2004

STATUS

approved

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Last modified February 22 20:16 EST 2019. Contains 320404 sequences. (Running on oeis4.)