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A131580 Least prime P such that P^(2*p(n))-P^p(n)-1 is prime with p(n)=i-th prime. +0
1
2, 3, 2, 3, 163, 19, 151, 263, 131, 3041, 311, 401, 2029, 1163, 2309, 157, 541, 61, 739, 563, 1097, 4813, 1801, 1399, 709, 317, 14563, 863, 5479, 337, 2351, 9533 (list; graph; listen)
OFFSET

1,1

EXAMPLE

2^(2*2)-2^2-1=11 prime, 2 is p(1) so P(1)=2

2^(2*3)-2^3-1=55=5*11 composite

3^(2*3)-3^3-1=701 prime, 3 is p(2) so P(2)=3

CROSSREFS

Sequence in context: A138781 A038700 A125767 this_sequence A087038 A060847 A079528

Adjacent sequences: A131577 A131578 A131579 this_sequence A131581 A131582 A131583

KEYWORD

nonn

AUTHOR

Pierre CAMI (pierrecami(AT)tele2.fr), Aug 29 2007

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Last modified December 3 01:16 EST 2008. Contains 151161 sequences.


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