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A070289
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Number of distinct values of multinomial coefficients ( n / (p1, p2, p3, ...) ) where (p1, p2, p3, ...) runs over all partitions of n.
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18
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1, 1, 2, 3, 5, 7, 11, 14, 20, 27, 36, 47, 64, 79, 102, 125, 157, 193, 243, 296, 366, 441, 538, 639, 773, 911, 1092, 1294, 1532, 1799, 2131, 2475, 2901, 3369, 3935, 4554, 5292, 6084, 7033, 8087, 9292, 10617, 12198, 13880, 15874, 18039, 20541, 23263, 26414, 29838
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OFFSET
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0,3
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LINKS
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FORMULA
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MAPLE
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b:= proc(n, i) option remember;
if n=0 then {1} elif i<1 then {} else {b(n, i-1)[],
seq(map(x-> x*i!^j, b(n-i*j, i-1))[], j=1..n/i)} fi
end:
a:= n-> nops(b(n, n)):
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MATHEMATICA
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b[n_, i_] := b[n, i] = If[n == 0, {1}, If[i<1, {}, Union[Join[b[n, i-1], Flatten[ Table[Function[{x}, x*i!^j] /@ b[n-i*j, i-1], {j, 1, n/i}]]]]]]; a[n_] := Length[b[n, n]]; Table[a[n], {n, 0, 50}] (* Jean-François Alcover, Mar 23 2015, after Alois P. Heinz *)
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PROG
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(Sage)
P = Partitions(n)
M = set(multinomial(list(x)) for x in P)
return len(M)
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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