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A038073
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Shifts left under Weigh transform.
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3
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-1, -1, 0, 0, 1, 0, -1, -1, 1, 2, 0, -3, -3, 2, 8, 4, -10, -18, 1, 36, 33, -36, -102, -33, 170, 238, -95, -578, -401, 762, 1599, 97, -3184, -3493, 2950, 10277, 4570, -16611, -26794, 6751, 63040, 51658, -78369, -190465, -34209, 365790, 455401, -296331, -1275020
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OFFSET
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1,10
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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,
add(binomial(a(i), j)*b(n-i*j, i-1), j=0..n/i)))
end:
a:= n-> `if`(n<2, -1, b((n-1)$2)):
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MATHEMATICA
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b[n_, i_] := b[n, i] = If[n==0, 1, If[i<1, 0, Sum[Binomial[a[i], j]*b[n-i*j, i-1], {j, 0, n/i}]]]; a[n_] := If[n<2, -1, b[n-1, n-1]]; Table[a[n], {n, 1, 60}] (* Jean-François Alcover, Feb 27 2017, after Alois P. Heinz *)
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CROSSREFS
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KEYWORD
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sign,eigen
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AUTHOR
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STATUS
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approved
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