A155083 A directed animal related triangle.

1, 1, 1, 2, 3, 1, 5, 9, 6, 1, 13, 29, 25, 10, 1, 35, 92, 100, 55, 15, 1, 96, 291, 377, 266, 105, 21, 1, 267, 915, 1375, 1169, 602, 182, 28, 1

Offset: 0

Author

Paul Barry, Jan 19 2009

Keywords

• easy
• nonn
• tabl

Comments

First column is A005773. Row sums are A129775.

Examples

			Triangle begins
1,
1, 1,
2, 3, 1,
5, 9, 6, 1,
13, 29, 25, 10, 1,
35, 92, 100, 55, 15, 1,
96, 291, 377, 266, 105, 21, 1,
267, 915, 1375, 1169, 602, 182, 28, 1
		

Formula

G.f.: 1/(1-xy-x/(1-x-xy-x^2/(1-x-xy-x^2/(1-x-xy-x^2/(1-...))))) (continued fraction).