A144337 Triangle read by rows, A000012 * (2*A144328 - A000012).

1, 2, 1, 3, 2, 3, 4, 3, 6, 5, 5, 4, 9, 10, 7, 6, 5, 12, 15, 14, 9, 7, 6, 15, 20, 21, 18, 11, 8, 7, 18, 25, 28, 27, 22, 13, 9, 8, 21, 30, 35, 36, 33, 26, 15, 10, 9, 24, 35, 42, 45, 44, 39, 30, 17, 11, 10, 27, 40, 49, 54, 55, 52, 45, 34, 19

Offset: 1

Author

Gary W. Adamson and Roger L. Bagula, Sep 18 2008

Keywords

• nonn
• tabl

Comments

When the first column is removed from this triangle (A144337), the result is triangle A101447. - Georg Fischer, Aug 10 2023

Examples

			First few rows of the triangle:
   1;
   2,  1;
   3,  2,  3;
   4,  3,  6,  5;
   5,  4,  9, 10,  7;
   6,  5, 12, 15, 14,  9;
   7,  6, 15, 20, 21, 18, 11;
   8,  7, 18, 25, 28, 27, 22, 13;
   9,  8, 21, 30, 35, 36, 33, 26, 15;
  10,  9, 24, 35, 42, 45, 44, 39, 30, 17;
  ...
		

Crossrefs

Cf. A081489, A101447, A144328.

Extensions

a(25) corrected by Georg Fischer, Aug 10 2023