A139064 Primes of the form (7+k!)/7.

5702401, 186810624001, 2988969984001, 2215887149047283712000001, 1476163995198020704238093048217600000001, 19811874077955690819705574245769915192271839538955347505831613562880000000000001

Offset

1,1

Comments

Numbers k for which (7+k!)/7 is prime (see A139065).

Links

Table of n, a(n) for n=1..6.

Mathematica

a = {}; Do[If[PrimeQ[(n! + 7)/7], AppendTo[a, (n! + 7)/7]], {n, 1, 50}]; a

Prog

(PARI) for(k=7, 1e3, if(ispseudoprime(t=k!/7+1), print1(t", "))) \\ Charles R Greathouse IV, Jul 15 2011

Crossrefs

Cf. A082672, A089085, A089130, A117141, A007749, A139056, A139057, A139058, A139059, A139060, A139061, A139061, A139062, A139063, A139064, A139065, A139066, A020458.

Sequence in context: A246055 A210353 A205045 * A151655 A283445 A234256

Adjacent sequences: A139061 A139062 A139063 * A139065 A139066 A139067

Keyword

nonn

Author

Artur Jasinski, Apr 07 2008

Status

approved