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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
1057749, 2527374, 3850824, 4925140, 8318772, 8389776, 12195316, 15864637, 15876420, 16892233, 18032409, 19674784, 23413356, 23468604, 25331430, 27601386, 29421304, 30105598, 32702874, 39389043, 40515487, 43949157, 45468864 (list; graph; refs; listen; history; text; internal format)
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

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Last modified January 22 21:47 EST 2022. Contains 350504 sequences. (Running on oeis4.)