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A337934
Sums of two distinct abundant numbers.
0
30, 32, 36, 38, 42, 44, 48, 50, 52, 54, 56, 58, 60, 62, 64, 66, 68, 70, 72, 74, 76, 78, 80, 82, 84, 86, 88, 90, 92, 94, 96, 98, 100, 102, 104, 106, 108, 110, 112, 114, 116, 118, 120, 122, 124, 126, 128, 130, 132, 134, 136, 138, 140, 142, 144, 146, 148, 150, 152, 154, 156, 158, 160
OFFSET
1,1
EXAMPLE
30 is in the sequence since it is the sum of the two distinct abundant numbers 12 and 18.
MATHEMATICA
Table[If[Sum[(1 - Sign[Floor[(2 (n - i))/DivisorSigma[1, n - i]]])*(1 - Sign[Floor[(2 i)/DivisorSigma[1, i]]]), {i, Floor[(n - 1)/2]}] > 0, n, {}], {n, 200}] // Flatten
CROSSREFS
Cf. A005101.
Sequence in context: A043810 A043819 A133266 * A335148 A328737 A370127
KEYWORD
nonn
AUTHOR
Wesley Ivan Hurt, Oct 01 2020
STATUS
approved