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A049995
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Number of arithmetic progressions of 4 or more positive integers, nondecreasing with sum <= n.
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0
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0, 0, 0, 1, 2, 3, 4, 6, 7, 10, 11, 14, 15, 18, 21, 25, 26, 30, 31, 37, 40, 44, 45, 51, 55, 59, 62, 69, 70, 79, 80, 86, 89, 94, 101, 111, 112, 117, 120, 132, 133, 143, 144, 152, 162, 168, 169, 180, 184, 196, 200, 209, 210, 221, 230, 242, 246, 253, 254, 274, 275, 282, 291, 302, 312, 325, 326, 336
(list;
graph;
refs;
listen;
history;
text;
internal format)
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OFFSET
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1,5
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LINKS
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FORMULA
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G.f.: (g.f. of A049994)/(1-x). (End)
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CROSSREFS
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Cf. A014405, A014406, A049980, A049981, A049982, A049983, A049987, A049988, A049989, A049990, A049991, A049992, A049993, A049994, 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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