A131325 Triangle |3*|A049310(n,k)| - 2| read by rows, 0 <= k <= n.

1, 2, 1, 1, 2, 1, 2, 4, 2, 1, 1, 2, 7, 2, 1, 2, 7, 2, 10, 2, 1, 1, 2, 16, 2, 13, 2, 1, 2, 10, 2, 28, 2, 16, 2, 1, 1, 2, 28, 2, 43, 2, 19, 2, 1, 2, 13, 2, 58, 2, 61, 2, 22, 2, 1, 1, 2, 43, 2, 103, 2, 82, 2, 25, 2, 1, 2, 16, 2, 103, 2, 166, 2, 106, 2, 28, 2, 1, 1, 2, 61, 2, 208, 2, 250, 2

Offset: 0

Author

Gary W. Adamson, Jun 28 2007

Keywords

• nonn
• tabl

Examples

			First few rows of the triangle:
  1;
  2,  1;
  1,  2,  1;
  2,  4,  2,  1;
  1,  2,  7,  2,  1;
  2,  7,  2, 10,  2,  1;
  1,  2, 16,  2, 13,  2,  1;
  ...
		

Crossrefs

Cf. A049310, A131324, A131326 (row sums), A131327.

Programs

Maple

A131325 := proc(n,k)
    abs(3*abs(A049310(n,k))-2) ;
end proc:
seq(seq(A131325(n,k),k=0..n),n=0..12) ; # R. J. Mathar, Aug 13 2012

Extensions

Definition corrected by David Scambler, Aug 12 2012