

A163081


Primes of the form p$ + 1 where p is prime, where '$' denotes the swinging factorial A056040.


0




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 n$ + 1).


REFERENCES

Peter Luschny, "Divide, swing and conquer the factorial and the lcm{1,2,...,n}", preprint, April 2008.


LINKS

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

Cf. A103319, A163074 through A163083.
Sequence in context: A263049 A167917 A249761 * A096239 A074699 A115088
Adjacent sequences: A163078 A163079 A163080 * A163082 A163083 A163084


KEYWORD

nonn


AUTHOR

Peter Luschny, Jul 21 2009


STATUS

approved



