A113352 Column 2 of triangle A113350, also equals column 0 of A113340^6.

1, 6, 51, 561, 7726, 129406, 2572892, 59525136, 1576414408, 47144606666, 1574176301192, 58126182666796, 2354183194432226, 103850488571214174, 4959424774062415780, 255032863135423053615, 14056171975717324065788

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+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^6)[n+1, 1]

Crossrefs

Cf. A113340, A113350, A113346 (column 0), A113351 (column 1), A113353 (column 3), A113354 (column 4).

Sequence in context: A124565 A057817 A000405 * A063169 A346667 A246189

Adjacent sequences: A113349 A113350 A113351 * A113353 A113354 A113355

Keyword

nonn

Author

Paul D. Hanna, Nov 08 2005

Status

approved