A129239 Triangle read by rows: A054521 * A129234 as infinite lower triangular matrices.

1, 1, 0, 3, 2, 0, 4, 0, 3, 0, 10, 5, 3, 4, 0, 6, 0, 0, 0, 5, 0, 21, 9, 7, 4, 5, 6, 0, 16, 0, 3, 0, 5, 0, 7, 0, 27, 10, 0, 9, 5, 0, 7, 8, 0, 20, 0, 8, 0, 0, 0, 7, 0, 9, 0, 55, 20, 12, 9, 11, 6, 7, 8, 9, 10, 0, 24, 0, 0, 0, 5, 0, 7, 0, 0, 0, 11, 0, 78, 27, 18, 15, 11, 13, 7, 8, 9, 10, 11, 12, 0

Offset

1,4

Comments

Left column = A023896: (1, 1, 3, 4, 10, 6, 21, ...).

Links

Table of n, a(n) for n=1..91.

Example

First few rows of the triangle:
   1;
   1, 0;
   3, 2, 0;
   4, 0, 3, 0;
  10, 5, 3, 4, 0;
   6, 0, 0, 0, 5, 0;
  21, 9, 7, 4, 5, 6, 0;
  16, 0, 3, 0, 5, 0, 7, 0;
  ...

Crossrefs

Cf. A023896, A054521, A129234.

Sequence in context: A088161 A005874 A275622 * A224825 A341413 A290794

Adjacent sequences: A129236 A129237 A129238 * A129240 A129241 A129242

Keyword

nonn,tabl

Author

Gary W. Adamson, Apr 05 2007

Extensions

a(21) = 0 inserted and more terms from Georg Fischer, May 29 2023

Status

approved