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A049991
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a(n) is the number of arithmetic progressions of 2 or more positive integers, nondecreasing with sum <= n.
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8
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0, 1, 3, 6, 9, 15, 19, 25, 33, 41, 47, 60, 67, 77, 92, 104, 113, 132, 142, 158, 178, 193, 205, 231, 247, 264, 289, 310, 325, 359, 375, 397, 427, 449, 473, 513, 532, 556, 591, 623, 644, 689, 711, 741, 788, 817, 841, 892, 920, 957, 1003, 1038, 1065, 1121, 1157, 1197, 1248, 1284, 1314, 1384, 1415
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OFFSET
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1,3
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LINKS
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FORMULA
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G.f.: (g.f. of A049990)/(1-x). (End)
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CROSSREFS
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Cf. A014405, A014406, A049980, A049981, A049982, A049983, A049987, A049988, A049989, A049990, A049991, A111333, A127938.
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KEYWORD
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nonn
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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