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A152148 Riordan array [exp(-x/2)(1-2x)^(-1/4),x]. 1
1, 0, 1, 1, 0, 1, 4, 3, 0, 1, 27, 16, 6, 0, 1, 232, 135, 40, 10, 0, 1, 2455, 1392, 405, 80, 15, 0, 1, 30852, 17185, 4872, 945, 140, 21, 0, 1, 449113, 246816, 68740, 12992, 1890, 224, 28, 0, 1, 7432624, 4042017, 1110672, 206220 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

0,7

COMMENTS

Row sums are A002801. The Riordan array [exp(-x/m)(1-mx)^(-1/m^2),x] has production matrix with

e.g.f. exp(x*t)(t+1/(1-mx)).

LINKS

Table of n, a(n) for n=0..48.

EXAMPLE

Triangle begins

1,

0, 1,

1, 0, 1,

4, 3, 0, 1,

27, 16, 6, 0, 1,

232, 135, 40, 10, 0, 1,

2455, 1392, 405, 80, 15, 0, 1

The production matrix of this array begins

0, 1,

1, 0, 1,

4, 2, 0, 1,

24, 12, 3, 0, 1,

192, 96, 24, 4, 0, 1;

1920, 960, 240, 40, 5, 1

and has e.g.f. exp(x*t)(t+1/(1-2x)).

CROSSREFS

Sequence in context: A298739 A294188 A152151 * A270708 A198261 A284056

Adjacent sequences:  A152145 A152146 A152147 * A152149 A152150 A152151

KEYWORD

easy,nonn,tabl

AUTHOR

Paul Barry, Nov 26 2008

STATUS

approved

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Last modified May 25 03:50 EDT 2019. Contains 323539 sequences. (Running on oeis4.)