A330696 Flimsy primes.

11, 13, 19, 23, 29, 37, 41, 43, 47, 53, 59, 61, 67, 71, 79, 83, 97, 101, 103, 107, 109, 113, 131, 137, 139, 149, 151, 157, 163, 167, 173, 179, 181, 191, 193, 197, 199, 211, 223, 227, 229, 233, 239, 241, 251, 263, 269, 271, 277, 281, 283, 293, 307, 311, 313

Offset: 1

Author

Jeffrey Shallit, Dec 26 2019

Keywords

• nonn
• base

Comments

A number n is flimsy if there exists an integer k such that A000120(kn) < A000120(n).

Links

• Trevor Clokie et al., Computational Aspects of Sturdy and Flimsy Numbers, arxiv preprint arXiv:2002.02731 [cs.DS], February 7 2020.
• Kenneth B. Stolarsky, Integers whose multiples have anomalous digital frequencies, Acta Arithmetica 38 (2) (1980), 117-128.

Crossrefs

Cf. A000120. This sequence is the complementary sequence (with respect to the primes) of A143027.