|
| |
|
|
A113346
|
|
Column 0 of triangle A113345, also equals column 0 of A113350.
|
|
13
| |
|
|
1, 2, 5, 19, 113, 966, 10958, 156700, 2727794, 56306696, 1350043965, 36979531549, 1141573025172, 39272377323693, 1491452150268436, 62027842189908231, 2805631215820328992, 137199563717151509077, 7215932308408758314447
(list; graph; refs; listen; history; internal format)
|
|
|
|
OFFSET
| 0,2
|
|
|
COMMENTS
| A113345 is the matrix square of A113340.
|
|
|
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^2)[n+1, 1]}
|
|
|
CROSSREFS
| Cf. A113340, A113345, A113347 (column 1), A113348 (column 2), A113349 (column 3); A113350.
Sequence in context: A107882 A192445 A089126 * A198945 A054926 A002786
Adjacent sequences: A113343 A113344 A113345 * A113347 A113348 A113349
|
|
|
KEYWORD
| nonn
|
|
|
AUTHOR
| Paul D. Hanna (pauldhanna(AT)juno.com), Nov 08 2005
|
| |
|
|
