A136536 Triangle read by rows: A001263 * A128064 * A000012 as infinite lower triangular matrices.

1, 2, 2, 5, 7, 3, 14, 19, 19, 4, 42, 51, 71, 41, 5, 132, 146, 216, 216, 76, 6, 429, 449, 617, 827, 547, 127, 7, 1430, 1457, 1793, 2675, 2675, 1205, 197, 8, 4862, 4897, 5497, 8017, 10369, 7429, 2389, 289, 9, 16796, 16840, 17830, 23770, 34858, 34858, 18226, 4366, 406, 10

Offset

1,2

Comments

Row sums = A001791: (1, 4, 15, 56, 210, 792, ...).

Left column = A000108 starting (1, 2, 5, 14, 42, 132, 429, ...).

Links

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

Example

First few rows of the triangle:
    1;
    2,   2;
    5,   7,   3;
   14,  19,  19,   4;
   42,  51,  71,  41,   5;
  132, 146, 216, 216,  76,   6;
  429, 449, 617, 827, 547, 127,   7;
  ...

Crossrefs

Cf. A000108, A001263, A001791, A128064.

Sequence in context: A120843 A205674 A021447 * A023507 A095674 A207981

Adjacent sequences: A136533 A136534 A136535 * A136537 A136538 A136539

Keyword

nonn,tabl

Author

Gary W. Adamson, Jan 04 2008

Extensions

a(46) = 16796 corrected and two more terms from Georg Fischer, May 31 2023

Status

approved