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 A162893 Integers n such that the century defined by the interval [100n+1,100n+100] (i.e., the (n+1)-st century) contains exactly three Ormiston prime pairs and no other primes. 2

%I #7 Dec 06 2015 23:09:20

%S 1057749,2527374,3850824,4925140,8318772,8389776,12195316,15864637,

%T 15876420,16892233,18032409,19674784,23413356,23468604,25331430,

%U 27601386,29421304,30105598,32702874,39389043,40515487,43949157,45468864

%N Integers n such that the century defined by the interval [100n+1,100n+100] (i.e., the (n+1)-st century) contains exactly three Ormiston prime pairs and no other primes.

%C Ormiston pairs must be of the form (100n+13,100n+31), (100n+37,100n+73), (100n+79,100n+97).

%C There cannot be more than three Ormiston prime pairs in a century.

%Y Proper subsequence of A162892.

%K base,nonn

%O 1,1

%A _Ray Chandler_ and _Ki Punches_, Jul 16 2009

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Last modified June 18 04:26 EDT 2024. Contains 373468 sequences. (Running on oeis4.)