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Search: id:A107065
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| A107065 |
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Riordan array (1/(1-x),x(1+x+x^2+x^3)). |
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+0
2
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| 1, 1, 1, 1, 2, 1, 1, 3, 3, 1, 1, 4, 6, 4, 1, 1, 4, 10, 10, 5, 1, 1, 4, 13, 20, 15, 6, 1, 1, 4, 15, 32, 35, 21, 7, 1, 1, 4, 16, 44, 66, 56, 28, 8, 1, 1, 4, 16, 54, 106, 121, 84, 36, 9, 1, 1, 4, 16, 60, 150, 222, 204, 120, 45, 10, 1, 1, 4, 16, 63, 190, 357, 420, 323, 165, 55, 11, 1, 1, 4, 16
(list; table; graph; listen)
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OFFSET
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0,5
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COMMENT
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Row sums are A107066. Diagonal sums are A023436(n+1).
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FORMULA
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Triangle begins 1; 1, 1; 1, 2, 1; 1, 3, 3, 1; 1, 4, 6, 4, 1; 1, 4, 10, 10, 5, 1; 1, 4, 13, 20, 15, 6, 1;
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CROSSREFS
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Sequence in context: A090641 A055216 A128629 this_sequence A008975 A140280 A140586
Adjacent sequences: A107062 A107063 A107064 this_sequence A107066 A107067 A107068
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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), May 10 2005
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