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A294986
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Number of compositions (ordered partitions) of 1 into exactly 7n+1 powers of 1/(n+1).
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2
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1, 41245, 4561368175, 1104353764428365, 396695587555058190126, 174436242482643190451211853, 86237678200608256132213084584295, 46050764886573707269872023694736134925, 25997337847684377365651388718120083246723460
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OFFSET
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0,2
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LINKS
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FORMULA
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MAPLE
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b:= proc(n, r, p, k) option remember;
`if`(n<r, 0, `if`(r=0, `if`(n=0, p!, 0), add(
b(n-j, k*(r-j), p+j, k)/j!, j=0..min(n, r))))
end:
a:= n-> (k-> `if`(n=0, 1, b(k*n+1, 1, 0, n+1)))(7):
seq(a(n), n=0..12);
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MATHEMATICA
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b[n_, r_, p_, k_] := b[n, r, p, k] = If[n < r, 0, If[r == 0, If[n == 0, p!, 0], Sum[b[n - j, k*(r - j), p + j, k]/j!, {j, 0, Min[n, r]}]]];
a[n_] := If[n == 0, 1, b[#*n + 1, 1, 0, n + 1]]&[7];
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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