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1, 1, 2, 2, 4, 8, 12, 24, 48, 96, 288, 576, 1152, 2304, 6912, 13824, 27648, 82944, 165888, 497664, 1327104, 2985984, 7962624, 19906560, 59719680, 143327232, 358318080, 955514880, 2866544640, 7644119040, 17199267840, 51597803520, 137594142720, 412782428160
(list;
graph;
refs;
listen;
history;
text;
internal format)
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OFFSET
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0,3
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LINKS
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MAPLE
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b:= proc(n, i) option remember;
`if`(n=0, 1, `if` (i<1, 0,
max(seq(b(n-i*j, i-1) *n!/i!^j/(n-i*j)!/j!, j=0..n/i))))
end:
a:= n-> n!/b(n, n):
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MATHEMATICA
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b[0, _] = 1; b[_, _?NonPositive] = 0; b[n_, i_] := b[n, i] = Max[Table[b[n - i*j, i - 1]*n!/i!^j/(n - i*j)!/j!, {j, 0, n/i}]]; a[n_] := n!/b[n, n]; Table[a[n], {n, 0, 50}] (* Jean-François Alcover, Jan 24 2014, after Alois P. Heinz *)
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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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