A370660 Numbers k such that (7^k + 7*k)/7 is prime.
1, 4, 36, 160, 342, 1086, 2094, 11524
Offset: 1
Programs
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PARI
is(n) = ispseudoprime(7^(n-1)+n)
This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
is(n) = ispseudoprime(7^(n-1)+n)
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