A113362 - OEIS

A113362

Column 2 of triangle A113360, also equals column 1 of A113340^5.

1, 15, 210, 3285, 59395, 1241270, 29720808, 806720492, 24568601477, 831697990069, 31036137984664, 1267376997249262, 56270606942915489, 2701018385881136958, 139463341982980040911, 7711492696761363573725

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OFFSET

0,2

COMMENTS

A113360 equals the matrix cube of triangle A113340, where column 2 of A113340^3 = column 1 of A113340^5.

LINKS

Table of n, a(n) for n=0..15.

PROG

(PARI) a(n)=local(A, B); A=matrix(1, 1); A[1, 1]=1; for(m=2, n+3, 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^3)[n+3, 3]

CROSSREFS

Cf. A113340, A113350, A113360 (A113340^3), A113341 (column 0), A113361 (column 1), A113363 (column 3), A113364 (column 4).

Sequence in context: A186231 A001880 A240682 * A252875 A135519 A179091

Adjacent sequences: A113359 A113360 A113361 * A113363 A113364 A113365

KEYWORD

nonn

AUTHOR

Paul D. Hanna, Nov 08 2005

STATUS

approved