A347693 Smallest k >= 2*n such that k is a prime or twice a prime.

2, 2, 4, 6, 10, 10, 13, 14, 17, 19, 22, 22, 26, 26, 29, 31, 34, 34, 37, 38, 41, 43, 46, 46, 53, 53, 53, 58, 58, 58, 61, 62, 67, 67, 71, 71, 73, 74, 79, 79, 82, 82, 86, 86, 89, 94, 94, 94, 97, 101, 101, 103, 106, 106, 109, 113, 113, 118, 118, 118, 122, 122, 127, 127, 131, 131, 134

Offset

0,1

Comments

Suggested by the formula for A016726.

Links

Table of n, a(n) for n=0..66.

Crossrefs

Cf. A016726, A347694.

Sequence in context: A071058 A376005 A076178 * A308907 A285908 A060988

Adjacent sequences: A347690 A347691 A347692 * A347694 A347695 A347696

Keyword

nonn

Author

N. J. A. Sloane, Oct 04 2021

Status

approved