A037082 Primes of the form n!!! + 1.

2, 3, 5, 11, 19, 29, 163, 281, 881, 209441, 264539521, 72642169601, 9927882482918401, 26582634158080001, 141383412854531380076544001, 427380210218181008588800001, 2295148179742698933452800001

Offset

1,1

Links

Vincenzo Librandi, Table of n, a(n) for n = 1..26

Index entries for sequences related to factorial numbers

Example

11!!! + 1 = 11*8*5*2 + 1 = 881 is prime.

Mathematica

Select[Table[Times@@Range[n, 1, -3]+1, {n, 60}], PrimeQ] (* Harvey P. Dale, Jul 09 2014 *)

Crossrefs

Cf. A007661, A037083.

Sequence in context: A235661 A070865 A084697 * A084573 A155954 A358717

Adjacent sequences: A037079 A037080 A037081 * A037083 A037084 A037085

Keyword

nonn

Author

G. L. Honaker, Jr.

Status

approved