

A260826


Let f(k)=2*k^2+11. For n=0,1,...,11, a(n) = smallest m >= 0 such that f(m1) is composite if m>0, f(m), f(m+1), ...,f(m+n1) are prime, and f(m+n) is composite.


0



11, 13, 15, 18, 28, 578, 617, 2067795, 843755046, 134239787815, 1434279786435, 0
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OFFSET

0,1


COMMENTS

Sequence is complete, a(9) and a(10) are due to Giovanni Resta.


LINKS



EXAMPLE

Note that f(0), f(1), ..., f(10) are prime, while f(11) and f(12) are composite. So a(0)=11 and a(11)=0.


CROSSREFS



KEYWORD

nonn,fini,full


AUTHOR



STATUS

approved



