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A133016
Even imperfect numbers, divided by 2.
0
1, 2, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64
OFFSET
1,2
CROSSREFS
Cf. A005843, A014335, A014445, A014494, A026503, A028334. Imperfect numbers: A132999.
Sequence in context: A162880 A083792 A083794 * A026503 A235498 A052405
KEYWORD
easy,nonn
AUTHOR
Omar E. Pol, Oct 20 2007
STATUS
approved