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Search: id:A120493
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| 1, 1, 1, 2, 4, 2, 5, 15, 15, 5, 14, 56, 84, 56, 14, 42, 210, 420, 420, 210, 42, 132, 792, 1980, 2640, 1980, 792, 132, 428, 2996, 8988, 14980, 14980, 8988, 2996, 428, 1416, 11328, 39648, 79296, 99120, 79296, 39648, 11328, 1416
(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 given by [1, 1, 1, 1, 1, 1, 0, 0, 0, ...] DELTA [1, 1, 1, 1, 1, 1, 0, 0, 0, ...] where DELTA is the operator defined in A084938.
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FORMULA
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T(n,k)=A007318(n,k)*A024175(n).
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EXAMPLE
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Triangle begins:
1;
1, 1;
2, 4, 2;
5, 15, 15, 5;
14, 56, 84, 56, 14;
42, 210, 420, 420, 210, 42;
132, 792, 1980, 2640, 1980, 792, 132;
428, 2996, 8988, 14980, 14980, 8988, 2996, 428;
1416, 11328, 39648, 79296, 99120, 79296, 39648, 11328, 1416 ;...
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CROSSREFS
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Sequence in context: A011169 A117903 A167685 this_sequence A085880 A055883 A085843
Adjacent sequences: A120490 A120491 A120492 this_sequence A120494 A120495 A120496
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KEYWORD
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nonn,tabl
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AUTHOR
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Philippe DELEHAM (kolotoko(AT)wanadoo.fr), Aug 05 2006
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