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A163081 Primes of the form p$ + 1 where p is prime, where '$' denotes the swinging factorial A056040. 0
3, 7, 31, 4808643121, 483701705079089804581, 3283733939424401442167506310317720418331001 (list; graph; refs; listen; history; text; internal format)
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

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Last modified June 22 12:24 EDT 2017. Contains 288613 sequences.