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A020327
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Number of partitions of 1/n into 4 reciprocals of positive integers.
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4
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14, 108, 339, 694, 1104, 1816, 2021, 3363, 4053, 5370, 4444, 9052, 5205, 11215, 14348, 11334, 7786, 18204, 9859, 29662, 24183, 17889, 12648, 38904, 20559, 24821, 31884, 43698, 16480, 59019, 15409, 43600, 48011, 39273, 79516, 74034, 17029, 42954, 70221
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OFFSET
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1,1
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LINKS
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MATHEMATICA
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a[n_] := Length@ Solve[1/n == 1/w + 1/x + 1/y + 1/z && 0 < w <= x <= y <= z, {w, x, y, z}, Integers]; (* Robert G. Wilson v, Apr 30 2014 *)
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CROSSREFS
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KEYWORD
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nonn,changed
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AUTHOR
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STATUS
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approved
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