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A169935
Numbers n such that for some k>0, n*k=1 in the arithmetic defined in A169918.
2
1, 2, 3, 4, 5, 6, 7, 8, 9, 11, 12, 16, 17, 22, 23, 27, 28, 33, 34, 38, 39, 40, 44, 45, 49, 50, 51, 55, 56, 61, 62, 66, 67, 72, 73, 77, 78, 83, 84, 88, 89, 90, 94, 95, 99, 111, 112, 116, 117, 222, 223, 227, 228, 333, 334, 338, 339, 440, 444, 445, 449
OFFSET
1,2
COMMENTS
These would be the units if the structure formed a ring (which it does not).
EXAMPLE
22 is a member since 22*88 = 1. So is 23 since 23*8 = 1. 10 is not a member, even though 10 divides 9, since 10*9 = 0.
CROSSREFS
Sequence in context: A343681 A337941 A167620 * A193498 A361181 A239087
KEYWORD
nonn,base
AUTHOR
STATUS
approved