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.
Select[Prime[Range[1, 100000]], PrimeQ[(19^# + 2^#)/21]&]
is(n)=ispseudoprime((19^n+2^n)/21) \\ Charles R Greathouse IV, Jun 13 2017
Select[ Prime[ Range[1, 100000] ], PrimeQ[ (15^# + 14^#)/29 ]& ]
is(n)=ispseudoprime((15^n+14^n)/29) \\ Charles R Greathouse IV, Feb 20 2017
Select[Prime[Range[1, 100000]], PrimeQ[(17^# + 2^#)/19]&]
is(n)=ispseudoprime((17^n+2^n)/19) \\ Charles R Greathouse IV, Jun 06 2017
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