|
| |
|
|
A113348
|
|
Column 2 of triangle A113345, also equals column 0 of A113350^5.
|
|
4
| |
|
|
1, 10, 105, 1315, 19875, 357860, 7547602, 183518246, 5072961513, 157525315615, 5438681986872, 206954207984234, 8613936431369952, 389602050945939891, 19038814387466399303, 1000152089409979423044, 56229083214210734799693
(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+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^2)[n+3, 3]}
|
|
|
CROSSREFS
| Cf. A113340, A113345, A113346 (column 0), A113347 (column 1), A113349 (column 3); A113350.
Sequence in context: A079515 A024131 A000457 * A193274 A068883 A087599
Adjacent sequences: A113345 A113346 A113347 * A113349 A113350 A113351
|
|
|
KEYWORD
| nonn
|
|
|
AUTHOR
| Paul D. Hanna (pauldhanna(AT)juno.com), Nov 08 2005
|
| |
|
|
