A297415 Numbers k such that A019320(k) is in A217465.

25, 36, 52, 92, 124, 306, 361, 630, 656, 1648, 1780, 2508, 3300, 3540, 5728, 6260, 6450, 7500, 10820, 12656, 14076, 14132, 18836, 20960, 23456, 24272, 35280, 43136

Offset: 1

Author

Max Alekseyev, Dec 29 2017

Keywords

• nonn
• more

Crossrefs

Cf. A019320, A217465, A297412.

Set difference of A297414 and ({1} U A072226).

Programs

PARI

is_A297415(n) = my(m=polcyclo(n, 2)); (m>1) && Mod(2, m*(m+1))^m==2 && !ispseudoprime(m);