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A265435
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Riordan array (1, x*f(x)) where f(x) is the g.f. of A007564.
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1
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1, 0, 1, 0, 1, 1, 0, 4, 2, 1, 0, 19, 9, 3, 1, 0, 100, 46, 15, 4, 1, 0, 562, 254, 82, 22, 5, 1, 0, 3304, 1476, 474, 128, 30, 6, 1, 0, 20071, 8893, 2847, 773, 185, 39, 7, 1, 0, 124996, 55046, 17587, 4796, 1165, 254, 49, 8, 1, 0, 793774, 347922, 111006, 30378, 7461, 1665, 336, 60, 9, 1
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OFFSET
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0,8
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COMMENTS
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Triangle T(n,k), 0<=k<=n, read by rows, given by (0, 1, 3, 1, 3, 1, 3, 1, 3, ...) DELTA (1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, ...) where DELTA is the operator defined in A084938.
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LINKS
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Alois P. Heinz, Rows n = 0..140, flattened
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EXAMPLE
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Triangle begins:
1
0, 1
0, 1, 1
0, 4, 2, 1
0, 19, 9, 3, 1
0, 100, 46, 15, 4, 1
Production matrix begins:
0, 1
0, 1, 1
0, 3, 1, 1
0, 9, 3, 1, 1
0, 27, 9, 3, 1, 1
0, 81, 27, 9, 3, 1, 1
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CROSSREFS
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Cf. A007564, A108524 (row sums).
Sequence in context: A248721 A110324 A266861 * A277004 A113092 A033324
Adjacent sequences: A265432 A265433 A265434 * A265436 A265437 A265438
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KEYWORD
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nonn,tabl
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AUTHOR
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Philippe Deléham, Dec 09 2015
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STATUS
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approved
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