A225913 Composite numbers coprime to 6 such that A179382(n) = A000265(n-1), the odd part of n-1.

517, 1525, 1765, 1837, 2941, 3241, 3265, 3397, 3421, 3565, 4117, 4501, 4669, 6349, 7357, 8569, 8749, 8965, 9085, 9997, 10045, 10057, 10981, 11929, 13741, 14101, 15757, 16117, 18745, 18949, 18997, 19885, 20557, 20629, 21805, 22045, 22645, 24445, 24505, 25417, 25429, 25681, 25885, 25957, 26101, 26245, 27205

Offset: 1

Author

M. F. Hasler, May 20 2013

Keywords

• nonn

Comments

Inspired by the Conjecture mentioned in A225759.

Programs

PARI

forstep(n=1,9e9,6, A179382(n)==(n-1)>>valuation(n-1,2) & !isprime(n) & print1(n","))