|
|
A060371
|
|
a(n) = (prime(n) - 1)! + 1.
|
|
3
|
|
|
2, 3, 25, 721, 3628801, 479001601, 20922789888001, 6402373705728001, 1124000727777607680001, 304888344611713860501504000001, 265252859812191058636308480000001, 371993326789901217467999448150835200000001
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
OFFSET
|
1,1
|
|
COMMENTS
|
If the prime p is in A055469, that is if p = 2, 7, 11, 29, ... = A055469(j) which is valid for the first, 4th, 5th, 10th,.... entry here with j = 1, 2, 3, ..., then a(n) = A052295[A067186(j)] + 1. - R. J. Mathar, Apr 27 2007
It follows from Wilson's theorem that a(n) is divisible by the n-th prime. - Alonso del Arte, Feb 07 2014
|
|
LINKS
|
|
|
MATHEMATICA
|
|
|
PROG
|
(PARI) { n=1; forprime (p=1, 524, write("b060371.txt", n++, " ", (p - 1)! + 1); ) } \\ Harry J. Smith, Jul 04 2009
(Magma) [Factorial(NthPrime(n)-1)+1: n in [1..15]]; // Vincenzo Librandi, Oct 17 2017
|
|
CROSSREFS
|
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
|
|
EXTENSIONS
|
|
|
STATUS
|
approved
|
|
|
|