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

0,8

Comments

Row sums are A001472.

Links

Table of n, a(n) for n=0..58.

Example

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)).

Crossrefs

Sequence in context: A174860 A157391 A099097 * A136239 A225443 A222060

Adjacent sequences: A152147 A152148 A152149 * A152151 A152152 A152153

Keyword

easy,nonn,tabl

Author

Paul Barry, Nov 26 2008

Status

approved