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A163081
Primes of the form p$ + 1 where p is prime, where '$' denotes the swinging factorial (A056040).
1
3, 7, 31, 4808643121, 483701705079089804581, 3283733939424401442167506310317720418331001
OFFSET
1,1
COMMENTS
The values of p are 2, 3, 5, 31, 67, 139 which is A163079. Subsequence of A163075 (primes of the form k$ + 1).
LINKS
Peter Luschny, Swinging Primes.
EXAMPLE
3 and 3$ + 1 = 7 are prime, so 7 is a member.
MAPLE
a := proc(n) select(isprime, [$2..n]); select(isprime, map(x -> A056040(x)+1, %)) end:
CROSSREFS
KEYWORD
nonn
AUTHOR
Peter Luschny, Jul 21 2009
STATUS
approved