A083984 - OEIS

A083984

If k is a number with exactly two distinct decimal digits, say a and b, neither of which is 0 (i.e., a member of A101594), define the self-complement of k, SC(k), to be the number obtained by replacing a with b and vice versa. E.g. SC(232233) = 323322. Sequence contains numbers n such that n and SC(n) are relatively prime.

13, 14, 16, 17, 19, 23, 25, 29, 31, 32, 34, 35, 37, 38, 41, 43, 47, 49, 52, 53, 56, 58, 59, 61, 65, 67, 71, 73, 74, 76, 79, 83, 85, 89, 91, 92, 94, 95, 97, 98, 112, 113, 115, 116, 118, 119, 121, 122, 131, 133, 151, 155, 166, 181, 188, 191, 199, 211, 212, 221, 223, 227

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OFFSET

1,1

LINKS

Table of n, a(n) for n=1..62.

EXAMPLE

25 is a member as 25 and 52 are relatively prime, but 24 is not a member as 24 and 42 are not coprime.

CROSSREFS

Cf. A083983, A083985, A083986.

Sequence in context: A171492 A054031 A060275 * A272022 A079495 A076204

Adjacent sequences: A083981 A083982 A083983 * A083985 A083986 A083987

KEYWORD