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A163081
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Primes of the form p$ + 1 where p is prime. Here '$' denotes the swinging factorial function (A056040).
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OFFSET
| 1,1
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COMMENTS
| The values of p are 2, 3, 5, 31, 67, 139 which is A163079. Subsequence of A163075 (primes of the form n$ + 1).
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REFERENCES
| Peter Luschny, "Divide, swing and conquer the factorial and the lcm{1,2,...,n}", preprint, April 2008.
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LINKS
| Peter Luschny, Swinging Primes.
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EXAMPLE
| 3 and 3$ + 1 = 7 are prime, so 7 is a member.
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MAPLE
| a := proc(n) select(isprime, [$2..n]); select(isprime, map(x -> A056040(x)+1, %)) end:
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CROSSREFS
| Cf. A103319, A163074 through A163083.
Sequence in context: A070231 A167917 A161471 * A096239 A074699 A115088
Adjacent sequences: A163078 A163079 A163080 * A163082 A163083 A163084
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KEYWORD
| nonn
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AUTHOR
| Peter Luschny (peter(AT)luschny.de), Jul 21 2009
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