A152150 Riordan array [exp(x^2/2+x^4/4),x].

1, 0, 1, 1, 0, 1, 0, 3, 0, 1, 9, 0, 6, 0, 1, 0, 45, 0, 10, 0, 1, 105, 0, 135, 0, 15, 0, 1, 0, 735, 0, 315, 0, 21, 0, 1, 2625, 0, 2940, 0, 630, 0, 28, 0, 1, 0, 23625, 0, 8820, 0, 1134, 0, 36, 0, 1, 76545, 0, 118125, 0

Offset: 0

Author

Paul Barry, Nov 26 2008

Keywords

• easy
• nonn
• tabl

Comments

Row sums are A001472.

Examples

			Triangle begins
1,
0, 1,
1, 0, 1,
0, 3, 0, 1,
9, 0, 6, 0, 1,
0, 45, 0, 10, 0, 1,
105, 0, 135, 0, 15, 0, 1,
0, 735, 0, 315, 0, 21, 0, 1
with production matrix which begins
0, 1,
1, 0, 1,
0, 2, 0, 1,
6, 0, 3, 0, 1,
0, 24, 0, 4, 0, 1;
120, 0, 60, 0, 5, 1
with e.g.f. exp(x*t)(t+1/(1-x^2)).