A113364 Column 4 of triangle A113360, also equals column 1 of A113360^3.

1, 27, 648, 16245, 442890, 13269069, 437085705, 15779515035, 621549547326, 26584365342579, 1228849871633643, 61116983784901476, 3257058909552139683, 185287271910574343301, 11212875913429712533737, 719555515466643129103760

Offset

0,2

Comments

A113360 equals the matrix cube of triangle A113340, where column 4 of A113340^3 = column 1 of A113340^9.

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+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^3)[n+5, 5]

Crossrefs

Cf. A113340, A113350, A113360 (A113340^3), A113341 (column 0), A113361 (column 1), A113362 (column 2), A113363 (column 3).

Sequence in context: A223500 A060603 A116988 * A095898 A014914 A157461

Adjacent sequences: A113361 A113362 A113363 * A113365 A113366 A113367

Keyword

nonn

Author

Paul D. Hanna, Nov 09 2005

Status

approved