A131894 A131843 * A000012.

1, 6, 3, 11, 6, 5, 16, 9, 8, 7, 21, 12, 11, 10, 9, 26, 15, 14, 13, 12, 11, 31, 18, 17, 16, 15, 14, 13, 36, 21, 20, 19, 18, 17, 16, 15, 41, 24, 23, 22, 21, 20, 19, 18, 17, 46, 27, 26, 25, 24, 23, 22, 21, 20, 19

Offset

0,2

Comments

Left column = A016861, 5n + 1: (1, 6, 11, 16, 21, 26, ...).

Row sums = A131895: (1, 9, 22, 40, 63, ...).

Triangle A131896 = A000012 * A131843.

Links

Table of n, a(n) for n=0..54.

Formula

Triangle read by rows, partial row sums starting from the right, of A131843.

Example

First few rows of the triangle:
   1;
   6,  3;
  11,  6,  5;
  16,  9,  8,  7;
  21, 12, 11, 10,  9;
  26, 15, 14, 13, 12, 11;
  ...

Crossrefs

Cf. A131843, A131895, A131896.

Sequence in context: A112456 A060534 A060445 * A368679 A335393 A040033

Adjacent sequences: A131891 A131892 A131893 * A131895 A131896 A131897

Keyword

nonn,tabl

Author

Gary W. Adamson, Jul 24 2007

Status

approved