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A241447
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Number of partitions p of n such that the number of parts having multiplicity 1 is a part and max(p) - min(p) is a part.
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5
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0, 0, 0, 1, 1, 2, 3, 3, 4, 6, 7, 9, 13, 19, 22, 29, 38, 45, 65, 75, 94, 119, 151, 181, 238, 280, 341, 419, 526, 615, 764, 920, 1097, 1335, 1605, 1902, 2285, 2733, 3233, 3873, 4586, 5376, 6386, 7556, 8845, 10436, 12234, 14322, 16812, 19623, 22806, 26692
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OFFSET
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0,6
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LINKS
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FORMULA
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EXAMPLE
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a(6) counts these 3 partitions: 42, 321, 21111.
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MATHEMATICA
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z = 30; f[n_] := f[n] = IntegerPartitions[n]; u[p_] := Length[DeleteDuplicates[Select[p, Count[p, #] == 1 &]]]; d[p_] := Length[DeleteDuplicates[p]];
Table[Count[f[n], p_ /; MemberQ[p, u[p]] && MemberQ[p, Max[p]-Min[p]]], {n, 0, z}] (* A241447 *)
Table[Count[f[n], p_ /; ! MemberQ[p, u[p]] && MemberQ[p, Max[p]-Min[p]] ], {n, 0, z}] (* A241448 *)
Table[Count[f[n], p_ /; MemberQ[p, u[p]] && ! MemberQ[p, Max[p]-Min[p]] ], {n, 0, z}] (* A241449 *)
Table[Count[f[n], p_ /; ! MemberQ[p, u[p]] && ! MemberQ[p, Max[p]-Min[p]] ], {n, 0, z}] (* A241450 *)
Table[Count[f[n], p_ /; MemberQ[p, u[p]] || MemberQ[p, Max[p]-Min[p]] ], {n, 0, z}] (* A241451 *)
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CROSSREFS
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KEYWORD
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nonn,easy
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AUTHOR
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STATUS
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approved
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