A131896 A000012 * A131843.

1, 4, 3, 9, 4, 5, 16, 5, 6, 7, 25, 6, 7, 8, 9, 36, 7, 8, 9, 10, 11, 49, 8, 9, 10, 11, 12, 13, 64, 9, 10, 11, 12, 13, 14, 15, 81, 10, 11, 12, 13, 14, 15, 16, 17, 100, 11, 12, 13, 14, 15, 16, 17, 18, 19

Offset

1,2

Comments

Row sums = A000566: (1, 7, 18, 34, 55, 81, ...), binomial transform of (1, 6, 5, 0, 0, 0, ...).

A131894 = A131843 * A000012.

Links

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

Formula

A000012 * A131843 as infinite lower triangular matrices.

Example

First few rows of the triangle:
   1;
   4,  3;
   9,  4,  5;
  16,  5,  6,  7;
  25,  6,  7,  8,  9;
  36,  7,  8,  9, 10, 11;
  49,  8,  9, 10, 11, 12, 13;
  64,  9, 10, 11, 12, 13, 14, 15;
  ...

Crossrefs

Cf. A131843, A000566.

Sequence in context: A232814 A074123 A016704 * A114380 A293130 A103825

Adjacent sequences: A131893 A131894 A131895 * A131897 A131898 A131899

Keyword

nonn,tabl

Author

Gary W. Adamson, Jul 24 2007

Status

approved