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A134197
Primes that occur in A126990 twice.
3
3, 7, 13, 23, 31, 47, 61, 73, 89, 103, 113, 131, 139, 151, 167, 181, 193, 199, 233, 241, 271, 293, 317, 337, 359, 389, 409, 421, 433, 449, 467, 491, 509, 523, 547, 577, 601, 619, 647, 661, 691, 709, 743, 761, 773, 797, 811, 823, 839, 863, 887, 919, 941, 953
OFFSET
1,1
COMMENTS
It seems, as tested up to prime(100000), that triplicates of primes do not occur in A126990, so this sequence stays the same if defined as either "... in A126990 exactly twice" or "... in A126990 at least twice." - Michel Marcus and R. J. Mathar, Nov 07 2013
LINKS
PROG
(PARI) lista(nn) = {last = A126990(1); for (n=2, nn, new = A126990(n); if (new == last, print1(new, ", ")); last = new; ); } \\ Michel Marcus, Nov 07 2013
CROSSREFS
Sequence in context: A372209 A334163 A291546 * A053001 A053607 A209407
KEYWORD
nonn
AUTHOR
Artur Jasinski, Oct 13 2007
EXTENSIONS
More terms from Michel Marcus, Nov 07 2013
STATUS
approved