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A342643
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a(n) = [x^n] x * Product_{j>=0} (1 + x^(2^j) + n*x^(2^(j+1))).
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1
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0, 1, 1, 4, 1, 11, 7, 57, 1, 28, 21, 265, 13, 365, 211, 3616, 1, 69, 55, 1141, 41, 1828, 1013, 25439, 25, 1951, 1405, 41608, 813, 50519, 27931, 954305, 1, 166, 137, 5041, 109, 8363, 4447, 182638, 81, 10251, 7183, 327403, 3961, 372736, 198997, 9971521, 49, 9801
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OFFSET
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0,4
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LINKS
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FORMULA
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a(2^n) = 1 for n >= 0.
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MAPLE
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b:= proc(n, i) option remember; `if`(n<2, n, (h->
`if`(p=0, b(h, i), i*b(h, i)+b(h+1, i)))(iquo(n, 2, 'p')))
end:
a:= n-> b(n$2):
seq(a(n), n=0..55);
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CROSSREFS
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KEYWORD
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AUTHOR
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STATUS
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approved
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