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.

1057749, 2527374, 3850824, 4925140, 8318772, 8389776, 12195316, 15864637, 15876420, 16892233, 18032409, 19674784, 23413356, 23468604, 25331430, 27601386, 29421304, 30105598, 32702874, 39389043, 40515487, 43949157, 45468864

Offset

1,1

Comments

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

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

Links

Table of n, a(n) for n=1..23.

Crossrefs

Proper subsequence of A162892.

Sequence in context: A253660 A253730 A043679 * A234089 A076247 A076248

Adjacent sequences: A162890 A162891 A162892 * A162894 A162895 A162896

Keyword

base,nonn

Author

Ray Chandler and Ki Punches, Jul 16 2009

Status

approved