A135184 Triangle read by rows: A000012 * A128229^2 as infinite lower triangular matrices.

1, 3, 1, 5, 5, 1, 5, 11, 7, 1, 5, 11, 19, 9, 1, 5, 11, 19, 29, 11, 1, 5, 11, 19, 29, 41, 13, 1, 5, 11, 19, 29, 41, 55, 15, 1, 5, 11, 19, 29, 41, 55, 71, 17, 1, 5, 11, 19, 29, 41, 55, 71, 89, 19, 1, 5, 11, 19, 29, 41, 55, 71, 89, 109, 21, 1, 5, 11, 19, 29, 41, 55, 71, 89, 109, 131, 23, 1

Offset

1,2

Comments

Row sums = A006527: (1, 4, 11, 24, 45, 76, ...).

Links

Table of n, a(n) for n=1..78.

Example

First few rows of the triangle:
  1;
  3,  1;
  5,  5,  1;
  5, 11,  7,  1;
  5, 11, 19,  9,  1;
  5, 11, 19, 29, 11,  1;
  5, 11, 19, 29, 41, 13,  1;
  5, 11, 19, 29, 41, 55, 15,  1;
  ...

Crossrefs

Cf. A006527, A128229.

Sequence in context: A372283 A351965 A228785 * A210224 A131304 A131302

Adjacent sequences: A135181 A135182 A135183 * A135185 A135186 A135187

Keyword

nonn,tabl

Author

Gary W. Adamson, Nov 21 2007

Extensions

a(19), a(20) corrected and more terms from Georg Fischer, Jun 05 2023

Status

approved