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A128654 Primes occurring in A084704 exactly thrice. 3

%I #7 Jul 22 2020 11:35:43

%S 263,821,953,1049,1597,2143,2273,2677,2683,2699,2749,3251,3389,3709,

%T 3739,3761,3929,4013,4243,4409,4519,4603,4621,4639,4657,4943,5009,

%U 5387,5449,5483,5783,6173,6311,6373,6703,6737,6869,6983,7517,7603,7717,7993

%N Primes occurring in A084704 exactly thrice.

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

%Y Cf. A084704, A128653, A128655.

%K nonn

%O 1,1

%A _Zak Seidov_, Mar 18 2007

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Last modified December 6 19:52 EST 2023. Contains 367614 sequences. (Running on oeis4.)