A102213 Numbers m with A102210(m) > 1.

3, 7, 11, 13, 15, 19, 21, 23, 27, 29, 31, 35, 37, 39, 43, 45, 47, 51, 53, 55, 57, 59, 61, 63, 67, 71, 75, 77, 79, 83, 85, 87, 89, 91, 93, 95, 99, 101, 103, 105, 107, 109, 111, 113, 115, 117, 119, 121, 123, 125, 127, 131, 135, 139, 141, 143, 147, 149, 151, 153, 155, 157

Offset: 1

Author

Reinhard Zumkeller, Dec 30 2004

Keywords

• nonn
• base

Links

• Amiram Eldar, Table of n, a(n) for n = 1..10000

Crossrefs

Subsequence of A005408.

Cf. A102210, A102211, A102212.

Programs

Magma

[k:k in [1..160]|#[p:p in PrimesUpTo(k)| p eq BitwiseAnd(k,p)] gt 1 ]; // Marius A. Burtea, Jan 12 2020

Mathematica

f[n_] := Count[Range[n], ?(PrimeQ[#] && BitAnd[n, #] == # &)]; Select[Range[216], f[#] > 1 &] (* _Amiram Eldar, Jan 12 2020 *)

Formula

A102210(a(n)) > 1.