A131327 Triangle |4*|A049310(n,k)| - 3| read by rows, 0<=k<=n.

1, 3, 1, 1, 3, 1, 3, 5, 3, 1, 1, 3, 9, 3, 1, 3, 9, 3, 13, 3, 1, 1, 3, 21, 3, 17, 3, 1, 3, 13, 3, 37, 3, 21, 3, 1, 1, 3, 37, 3, 57, 3, 25, 3, 1, 3, 17, 3, 77, 3, 81, 3, 29, 3, 1, 1, 3, 57, 3, 137, 3, 109, 3, 33, 3, 1, 3, 21, 3, 137, 3, 221, 3, 141, 3, 37, 3, 1, 1, 3, 81, 3, 277, 3, 333, 3, 177

Offset: 0

Author

Gary W. Adamson, Jun 28 2007

Keywords

• nonn
• tabl

Examples

			First few rows of the triangle are:
1;
3, 1;
1, 3, 1;
3, 5, 3, 1;
1, 3, 9, 3, 1;
3, 9, 3, 13, 3, 1;
1, 3, 21, 3, 17, 3, 1;
...
		

Crossrefs

Cf. A049310, A131328 (row sums), A131324, A131325, A131326.

Programs

Maple

A131327 := proc(n,k)
    abs(4*abs(A049310(n,k))-3) ;
end proc:
seq(seq(A131327(n,k),k=0..n),n=0..12) ; # R. J. Mathar, Aug 13 2012

Extensions

Definition corrected. - R. J. Mathar, Aug 13 2012