OFFSET
1,1
LINKS
Amiram Eldar, Table of n, a(n) for n = 1..10000
FORMULA
A102210(a(n)) > 1.
MATHEMATICA
f[n_] := Count[Range[n], _?(PrimeQ[#] && BitAnd[n, #] == # &)]; Select[Range[216], f[#] > 1 &] (* Amiram Eldar, Jan 12 2020 *)
PROG
(Magma) [k:k in [1..160]|#[p:p in PrimesUpTo(k)| p eq BitwiseAnd(k, p)] gt 1 ]; // Marius A. Burtea, Jan 12 2020
CROSSREFS
KEYWORD
nonn,base
AUTHOR
Reinhard Zumkeller, Dec 30 2004
STATUS
approved