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

0,2

Links

Table of n, a(n) for n=0..85.

Example

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;
  ...

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

Crossrefs

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

Sequence in context: A261363 A341216 A116491 * A193749 A049824 A376580

Adjacent sequences: A131322 A131323 A131324 * A131326 A131327 A131328

Keyword

nonn,tabl

Author

Gary W. Adamson, Jun 28 2007

Extensions

Definition corrected by David Scambler, Aug 12 2012

Status

approved