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

2, 3, 19, 227, 255

Offset

1,1

Links

Table of n, a(n) for n=1..5.

Eric Weisstein's World of Mathematics, Euler Number.

Eric Weisstein's World of Mathematics, Integer Sequence Primes

Mathematica

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

Crossrefs

Cf. A000364.

Sequence in context: A061490 A048827 A032077 * A066735 A232498 A254380

Adjacent sequences: A014544 A014545 A014546 * A014548 A014549 A014550

Keyword

more,nonn

Author

Eric W. Weisstein

Extensions

Offset corrected by Arkadiusz Wesolowski, Oct 17 2011

Status

approved