A370661 Numbers k such that (8^k + 8*k)/8 is prime.
1, 3, 7, 15, 3907
Offset: 1
Programs
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PARI
is(n) = ispseudoprime(8^(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.
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