A076364 Number of distinct terms in dRRS equals 2: A061498(x)=2.

9, 10, 12, 14, 18, 20, 22, 24, 25, 26, 27, 28, 34, 36, 38, 40, 44, 46, 48, 49, 50, 52, 54, 56, 58, 62, 68, 72, 74, 76, 80, 81, 82, 86, 88, 92, 94, 96, 98, 100, 104, 106, 108, 112, 116, 118, 121, 122, 124, 125, 134, 136, 142, 144, 146, 148, 152, 158, 160, 162, 164

Offset: 1

Author

Labos Elemer, Oct 09 2002

Keywords

• nonn

Comments

2p and prime powers are here.

Crossrefs

Cf. A000010, A061498.

Programs

PARI

isok(n) = {my(va = select(x->(gcd(n, x)==1), [1..n])); vd = vector(#va-1, k, va[k+1] - va[k]); #Set(vd) == 2;} \\ Michel Marcus, Mar 30 2020