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A258081
Values of k in A071580.
3
1, 1, 1, 1, 2, 10, 12, 10, 21, 25, 70, 670, 239, 2115, 586, 1619, 26800, 2505, 99019, 40903, 285641, 67166, 1852765
OFFSET
1,5
COMMENTS
The first 23 terms were found using gwnum, and the first 22 have been independently checked using gmp.
LINKS
PROG
(PARI) terms=12; p=2; for(n=2, terms, q=p+1; while(!ispseudoprime(q), q=q+p); print1(q\p, ", "); p=p*q) \\ Serge Batalov, May 19 2015
CROSSREFS
KEYWORD
nonn,hard,more
AUTHOR
Andrew R. Booker, May 19 2015
STATUS
approved