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

1,1

Comments

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

Links

Table of n, a(n) for n=1..55.

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.

Sequence in context: A164861 A040150 A214629 * A103803 A188677 A068801

Adjacent sequences: A330693 A330694 A330695 * A330697 A330698 A330699

Keyword

nonn,base

Author

Jeffrey Shallit, Dec 26 2019

Status

approved