A093543 Main diagonal of square array A093541, in which column (k+1) equals the self-convolution of row k.

1, 2, 12, 138, 2888, 110856, 7930308, 1066762914, 269503442664, 127145506540264, 111423795046477280, 180809538057863059816, 542580059649459401231312, 3010357860273895667573920480, 30891867430474245598850484085824, 586720323003917440902757177392624562

Offset

0,2

Links

Jinyuan Wang, Table of n, a(n) for n = 0..84

Prog

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

Crossrefs

Cf. A093541, A093542.

Sequence in context: A185522 A119819 A330655 * A367636 A287885 A091144

Adjacent sequences: A093540 A093541 A093542 * A093544 A093545 A093546

Keyword

nonn

Author

Paul D. Hanna, Mar 30 2004

Extensions

More terms from Jinyuan Wang, Feb 28 2020

Status

approved