A014547 n-th Euler (secant, zig) number A000364(n) is prime.

2, 3, 19, 227, 255

Offset: 1

Author

Eric W. Weisstein

Keywords

• more
• nonn

Links

• Eric Weisstein's World of Mathematics, Euler Number.
• Eric Weisstein's World of Mathematics, Integer Sequence Primes

Crossrefs

Cf. A000364.

Programs

Mathematica

Select[Range[100], PrimeQ[EulerE[#]] &]/2 (* Harvey P. Dale, Aug 10 2011 *)

Extensions

Offset corrected by Arkadiusz Wesolowski, Oct 17 2011