A323070 Numbers k such that A055023(k) != A323071(k), where A323071(k) = gcd(k, 1+A060681(k)).

55, 105, 155, 203, 253, 355, 405, 455, 497, 595, 655, 689, 705, 737, 755, 791, 955, 979, 1005, 1027, 1055, 1081, 1221, 1255, 1305, 1355, 1379, 1555, 1605, 1655, 1673, 1703, 1711, 1751, 1855, 1905, 1955, 1967, 2065, 2155, 2189, 2205, 2255, 2261, 2329, 2455, 2505, 2555, 2755, 2805, 2849, 2855, 3055

Offset

1,1

Comments

Equivalently, numbers k for which A055032(k) != A323072(k).

Neither primes nor prime powers present?

Links

Table of n, a(n) for n=1..53.

Prog

(PARI)
A055023(n) = (n/denominator((sum(m=1, n - 1, m^(n - 1)) + 1)/n)); \\ From A055023.
A060681(n) = (n-if(1==n, n, n/vecmin(factor(n)[, 1])));
A323071(n) = gcd(n, 1+A060681(n));
is_A323070(n) = (A055023(n)!=A323071(n));

Crossrefs

Cf. A055023, A055032, A060681, A323071, A323072.

Sequence in context: A146145 A044144 A044525 * A118151 A277273 A275124

Adjacent sequences: A323067 A323068 A323069 * A323071 A323072 A323073

Keyword

nonn

Author

Antti Karttunen, Jan 04 2019

Status

approved