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A144947 Least a(n) such that p(n)#*(p(n)#+a(n))-1 and p(n)#*(p(n)#+a(n))+1 are twin primes with p(i)#=i-th primorial 4
1, 1, 4, 13, 16, 1, 43, 37, 126, 12, 226, 149, 97, 115, 33, 51, 9, 428, 68, 29, 34, 47, 583, 15, 502, 410, 336, 283, 756, 1303, 33, 793, 343, 703, 1024, 1888, 728, 782, 226, 493, 1977, 3265, 567, 151, 1096, 203, 77, 3255, 381, 4963 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

LINKS

Pierre CAMI, Table of n, a(n) for n = 1..200 [Corrected Oct 16 2008]

EXAMPLE

2*(2+1)-1=5 prime as 7 so a(1)=1 6*(6+1)-1=41 prime as 43 so a(2)=1

CROSSREFS

Cf. A144946

Sequence in context: A089733 A126908 A106681 * A022416 A027757 A287361

Adjacent sequences:  A144944 A144945 A144946 * A144948 A144949 A144950

KEYWORD

nonn

AUTHOR

Pierre CAMI, Sep 26 2008

STATUS

approved

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Last modified January 21 19:08 EST 2019. Contains 319350 sequences. (Running on oeis4.)