A131256 -id:A131256 - cp's OEIS frontend

A131257 Triangle read by rows: A052509 * A097807 as infinite lower triangular matrices.

1, 0, 1, 0, 1, 1, -1, 2, 1, 1, 0, 1, 3, 1, 1, 0, 1, 4, 3, 1, 1, 1, 0, 6, 5, 3, 1, 1, 0, 1, 6, 10, 5, 3, 1, 1, 0, 1, 7, 15, 11, 5, 3, 1, 1, -1, 2, 7, 22, 20, 11, 5, 3, 1, 1, 0, 1, 9, 28, 36, 21, 11, 5, 3, 1, 1, 0, 1, 10, 36, 57, 42, 21, 11, 5, 3, 1, 1, 1, 0, 12, 44, 86, 77, 43, 21, 11, 5, 3, 1, 1

Offset: 0

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Gary W. Adamson, Jun 23 2007

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Row sums give A099517.

			First few rows of the triangle:
   1;
   0, 1;
   0, 1, 1;
  -1, 2, 1, 1;
   0, 1, 3, 1, 1;
   0, 1, 4, 3, 1, 1;
   1, 0, 6, 5, 3, 1, 1;
  ...

Cf. A099517, A052509, A097807, A131256.

A052509 * A000012 (signed, + - + - by columns).

a(48) = 22 corrected and more terms from Georg Fischer, Jun 05 2023

cp's OEIS Frontend

A131257 Triangle read by rows: A052509 * A097807 as infinite lower triangular matrices.

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