A113351 Column 1 of triangle A113350, also equals column 0 of A113340^4.

1, 4, 22, 166, 1671, 21510, 341463, 6496923, 144856710, 3716746006, 108133664181, 3523951953981, 127331488458476, 5057405619797317, 219179491109978660, 10298771194610350427, 521765883689616772731, 28363341834962918344084

Offset

0,2

Links

Table of n, a(n) for n=0..17.

Prog

(PARI) a(n)=local(A, B); A=matrix(1, 1); A[1, 1]=1; for(m=2, n+1, 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^4)[n+1, 1]

Crossrefs

Cf. A113340, A113350, A113346 (column 0), A113352 (column 2), A113353 (column 3), A113354 (column 4).

Sequence in context: A067369 A247249 A368319 * A001827 A363115 A368285

Adjacent sequences: A113348 A113349 A113350 * A113352 A113353 A113354

Keyword

nonn

Author

Paul D. Hanna, Nov 08 2005

Status

approved