A113344 Column 4 of triangle A113340, also equals column 0 of A113340^9.

1, 9, 117, 1881, 36051, 805875, 20661609, 599319747, 19443585048, 698723462022, 27583235473854, 1187660855613822, 55430739480692085, 2789074498460404927, 150571050665946174760, 8684625004973955639293, 533144024633105768180154

Offset

0,2

Links

Table of n, a(n) for n=0..16.

Prog

(PARI) a(n)=local(A, B); A=matrix(1, 1); A[1, 1]=1; for(m=2, n+5, B=matrix(m, m); for(i=1, m, for(j=1, i, if(i<3 || j==i || j>m-1, B[i, j]=1, if(j==1, B[i, 1]=1, B[i, j]=(A^(2*j-1))[i-j+1, 1])); )); A=B); A[n+5, 5]

Crossrefs

Cf. A113341 (column 1), A113342 (column 2), A113343 (column 3), A113340.

Sequence in context: A255521 A027396 A294190 * A305968 A367473 A375722

Adjacent sequences: A113341 A113342 A113343 * A113345 A113346 A113347

Keyword

nonn

Author

Paul D. Hanna, Nov 08 2005

Status

approved