A134542 A134541 * A000012.

1, 1, 1, 1, 2, 1, 1, 2, 2, 1, 1, 3, 3, 2, 1, 1, 2, 3, 3, 2, 1, 1, 3, 4, 4, 3, 2, 1, 1, 3, 4, 4, 4, 3, 2, 1, 1, 3, 4, 5, 5, 4, 3, 2, 1, 1, 2, 4, 5, 5, 5, 4, 3, 2, 1

Offset

1,5

Comments

Row sums = A002088: (1, 2, 4, 6, 10, 12, 18, 22, ...).

A134542 * [1,2,3,...] = A015631: (1, 3, 8, 15, 29, 42, ...).

Links

Table of n, a(n) for n=1..55.

Formula

A134541 * A000012 as infinite lower triangular matrices.

Triangle read by rows, partial sums of A134541 terms starting from the right.

Example

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

Crossrefs

Cf. A134541, A002088, A015631.

Sequence in context: A301608 A285521 A187451 * A106254 A117147 A111007

Adjacent sequences: A134539 A134540 A134541 * A134543 A134544 A134545

Keyword

nonn,tabl,more

Author

Gary W. Adamson, Oct 31 2007

Status

approved