A152151 Riordan array [(1-x)exp(x/(1-x)),x]

1, 0, 1, 1, 0, 1, 4, 3, 0, 1, 21, 16, 6, 0, 1, 136, 105, 40, 10, 0, 1, 1045, 816, 315, 80, 15, 0, 1, 9276, 7315, 2856, 735, 140, 21, 0, 1, 93289, 74208, 29260, 7616, 1470, 224, 28, 0, 1, 1047376, 839601, 333936, 87780, 17136, 2646, 336, 36

Offset

0,7

Comments

First column is essentially A052852.

Links

Table of n, a(n) for n=0..52.

Example

Triangle begins
1,
0, 1,
1, 0, 1,
4, 3, 0, 1,
21, 16, 6, 0, 1,
136, 105, 40, 10, 0, 1,
1045, 816, 315, 80, 15, 0, 1,
9276, 7315, 2856, 735, 140, 21, 0, 1,
with production matrix which begins
0, 1,
1, 0, 1,
4, 2, 0, 1,
18, 12, 3, 0, 1,
96, 72, 24, 4, 0, 1,
600, 480, 180, 40, 5, 0, 1;
4320, 3600, 1440, 360, 60, 6, 1
with e.g.f. exp(x*t)(t+1/(1-x)^2).

Crossrefs

Sequence in context: A294188 A331956 A325019 * A327125 A152148 A270708

Adjacent sequences: A152148 A152149 A152150 * A152152 A152153 A152154

Keyword

easy,nonn,tabl

Author

Paul Barry, Nov 26 2008

Status

approved