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Search: id:A152150
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| A152150 |
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Riordan array [exp(x^2/2+x^4/4),x]. |
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+0
1
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| 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
(list; table; graph; listen)
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OFFSET
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0,8
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COMMENT
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Row sums are A001472.
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EXAMPLE
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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)).
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CROSSREFS
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Sequence in context: A020816 A157391 A099097 this_sequence A136239 A058175 A112906
Adjacent sequences: A152147 A152148 A152149 this_sequence A152151 A152152 A152153
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KEYWORD
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easy,nonn,tabl
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AUTHOR
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Paul Barry (pbarry(AT)wit.ie), Nov 26 2008
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