OFFSET
1,1
COMMENTS
Equivalently, smallest prime such that the next three primes are at distances divisible by 2n. The gaps are generally not the same, so these are not starting points of four consecutive primes in arithmetic progression (CPAP-4) as listed in A054800. - M. F. Hasler, Nov 06 2018
EXAMPLE
a(1) = 3 is the smallest prime such that the next three gaps (2, 2 and 4; involving primes 5, 7 and 11) are multiples of 2*1 = 2.
a(1) = 199 is the smallest prime such that the next three gaps (12, 12 and 4; to primes 211, 223, and 227) are multiples of 2*2 = 4.
CROSSREFS
KEYWORD
nonn
AUTHOR
Jeff Burch, Apr 20 2000
EXTENSIONS
More terms from Larry Reeves (larryr(AT)acm.org), Nov 09 2000
Corrected and extended by Donovan Johnson, Feb 26 2008
Edited by M. F. Hasler, Nov 06 2018
STATUS
approved