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Numbers n such that 2n-1 and 2n+3 are consecutive primes.
2

%I #3 Mar 30 2012 17:29:49

%S 4,7,10,19,22,34,40,49,52,55,64,82,97,112,115,139,154,157,175,190,199,

%T 220,229,232,244,250,307,322,337,370,379,385,412,427,430,439,442,454,

%U 469,484,505,544,547,607,640,649,652,712,715,724,742,745,775,784,790

%N Numbers n such that 2n-1 and 2n+3 are consecutive primes.

%F a(n) = (A029708(n)-1)/2 = (A029710(n)+1)/2 = (A031505(n)-3)/2.

%Y Essentially the same as A088762.

%K nonn

%O 1,1

%A _Ray Chandler_, Aug 24 2005