A128654 Primes occurring in A084704 exactly thrice.

263, 821, 953, 1049, 1597, 2143, 2273, 2677, 2683, 2699, 2749, 3251, 3389, 3709, 3739, 3761, 3929, 4013, 4243, 4409, 4519, 4603, 4621, 4639, 4657, 4943, 5009, 5387, 5449, 5483, 5783, 6173, 6311, 6373, 6703, 6737, 6869, 6983, 7517, 7603, 7717, 7993

Offset: 1

Author

Zak Seidov, Mar 18 2007

Keywords

• nonn

Examples

			263 occurs as the 42nd, 51st and 53rd terms: (prime(#)+263)/2/(AT){43,52,54}= {227,251,257} primes.
		

Crossrefs

Cf. A084704, A128653, A128655.