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Search: id:A147747
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| A147747 |
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Riordan array ((1-3x+x^2)/(1-4x+3x^2), x(1-2x)/(1-4x+3x^2)). |
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+0
4
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| 1, 1, 1, 2, 3, 1, 5, 9, 5, 1, 14, 28, 20, 7, 1, 41, 89, 75, 35, 9, 1, 122, 285, 273, 154, 54, 11, 1, 365, 913, 974, 634, 273, 77, 13, 1, 1094, 2918, 3420, 2502, 1256, 440, 104, 15, 1, 3281, 9297, 11850, 9578, 5439
(list; table; graph; listen)
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OFFSET
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0,4
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COMMENT
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Triangle [1,1,1,1,0,0,0,....] DELTA [1,0,0,0,....] with Deleham DELTA as in A084938.
Row sums are A147748. A147747=A147746*A007318.
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FORMULA
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Triangle begins
1,
1, 1,
2, 3, 1,
5, 9, 5, 1,
14, 28, 20, 7, 1,
41, 89, 75, 35, 9, 1,
122, 285, 273, 154, 54, 11, 1
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CROSSREFS
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Sequence in context: A071975 A055905 A147703 this_sequence A039599 A154380 A155083
Adjacent sequences: A147744 A147745 A147746 this_sequence A147748 A147749 A147750
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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 11 2008
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