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A228271 Prime-free centuries such that the next century is also prime-free. 0
473267, 1919128, 2131583, 2390652, 2844914, 2982584, 3909324, 4280455, 4658285, 4728653, 5165402, 5254365, 5369468, 5458298, 5551421, 5647232, 5817553, 6070101, 6334188, 6495802, 6877047, 7027013, 7074295, 7087303, 7157062, 7369010, 7392411, 7946633, 8469597 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
LINKS
G. L. Honaker, Jr. and Chris Caldwell, Prime Curios! 473268
EXAMPLE
473267 is in the sequence because there is no prime between 47326699 and 47326900.
PROG
(PARI) d=100; for(n=1, 10^7, if(nextprime(d*n)>d*(n+2), print1(n, ", ")));
CROSSREFS
Sequence in context: A114673 A251370 A190639 * A219996 A183659 A213994
KEYWORD
nonn,base
AUTHOR
STATUS
approved

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Last modified February 28 17:13 EST 2024. Contains 370400 sequences. (Running on oeis4.)