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A338554
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Number of non-constant integer partitions of n whose parts have a common divisor > 1.
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2
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0, 0, 0, 0, 0, 0, 1, 0, 2, 1, 5, 0, 9, 0, 13, 6, 18, 0, 33, 0, 40, 14, 54, 0, 87, 5, 99, 27, 133, 0, 211, 0, 226, 55, 295, 18, 443, 0, 488, 100, 637, 0, 912, 0, 1000, 198, 1253, 0, 1775, 13, 1988, 296, 2434, 0, 3358, 59, 3728, 489, 4563, 0, 6241, 0, 6840, 814
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OFFSET
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0,9
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LINKS
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FORMULA
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EXAMPLE
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The a(6) = 2 through a(15) = 6 partitions (empty columns indicated by dots, A = 10, B = 11, C = 12):
(42) . (62) (63) (64) . (84) . (86) (96)
(422) (82) (93) (A4) (A5)
(442) (A2) (C2) (C3)
(622) (633) (644) (663)
(4222) (642) (662) (933)
(822) (842) (6333)
(4422) (A22)
(6222) (4442)
(42222) (6422)
(8222)
(44222)
(62222)
(422222)
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MATHEMATICA
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Table[Length[Select[IntegerPartitions[n], !SameQ@@#&&GCD@@#>1&]], {n, 0, 30}]
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CROSSREFS
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A303280(n) - 1 is the strict case (n > 1).
A338552 lists the Heinz numbers of these partitions.
A000837 counts relatively prime partitions, with Heinz numbers A289509.
A282750 counts relatively prime partitions by sum and length.
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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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