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A259953
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The sum (in nondecreasing order) of the two numbers in an amicable pair.
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4
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504, 2394, 5544, 10584, 12600, 21600, 26880, 35712, 133920, 138240, 139104, 157248, 168480, 224640, 245520, 262080, 294840, 311040, 348192, 357120, 388800, 399168, 645624, 698544, 749952, 756000, 892800, 955206, 1017792, 1048320, 1270080, 1296000, 1296000, 1315440, 1347840, 1451520, 1522800, 1666560, 1781136, 1879200, 2041200
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OFFSET
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1,1
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COMMENTS
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Also the common value of sigma(x) = sigma(y) of the amicable pairs (x < y) ordered by nondecreasing sum (x + y). See A259933.
Duplicates occur, e.g., a(32) = a(33) = 1296000.
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LINKS
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FORMULA
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EXAMPLE
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------------------------------------------
A m i c a b l e p a i r Sum
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------------------------------------------
1 220 284 504
2 1184 1210 2394
3 2620 2924 5544
4 5020 5564 10584
5 6232 6368 12600
6 10744 10856 21600
7 12285 14595 26880
8 17296 18416 35712
9 66928 66992 133920
10 67095 71145 138240
11 63020 76084 139104
12 69615 87633 157248
... ... ... ...
32 609928 686072 1296000
33 643336 652664 1296000
...
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CROSSREFS
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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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