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A035538
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Number of partitions of n with equal nonzero number of parts congruent to each of 0 and 2 (mod 3)
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0
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0, 0, 0, 0, 0, 1, 1, 1, 3, 4, 5, 8, 11, 14, 19, 26, 34, 43, 56, 72, 90, 114, 145, 178, 222, 277, 338, 414, 511, 619, 751, 913, 1101, 1324, 1595, 1909, 2282, 2724, 3243, 3850, 4569, 5406, 6387, 7530, 8869, 10423, 12231, 14332, 16775, 19591, 22864, 26643, 31000
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OFFSET
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0,9
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LINKS
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Table of n, a(n) for n=0..52.
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MATHEMATICA
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equalQ[partit_] := With[{ t = Total[Switch[Mod[#, 3], 0, {1, 0, 0}, 1, {0, 1, 0}, 2, {0, 0, 1}]& /@ partit]}, t[[1]] > 0 && t[[1]] == t[[3]]]; a[n_] := Select[IntegerPartitions[n], equalQ] // Length; a[0] = 0; Table[an = a[n]; Print["a(", n, ") = ", an]; an, {n, 0, 52}] (* Jean-François Alcover, Dec 07 2016 *)
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CROSSREFS
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Sequence in context: A047599 A332414 A050846 * A039881 A035113 A106263
Adjacent sequences: A035535 A035536 A035537 * A035539 A035540 A035541
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KEYWORD
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nonn
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AUTHOR
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Olivier Gérard
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STATUS
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approved
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