A062621 Numbers k such that 55^k - 54^k is prime.
2, 5, 7, 701
Offset: 1
Programs
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PARI
is(n)=ispseudoprime(55^n-54^n) \\ Charles R Greathouse IV, Jun 13 2017
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(55^n-54^n) \\ Charles R Greathouse IV, Jun 13 2017
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