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A069472 Smallest twin prime in a sequence of exactly n disjoint twin pairs, sandwiched between non-twins. 0

%I #11 Feb 14 2015 01:16:35

%S 29,101,179,9419,909287,325267931,678771479,1107819732821,

%T 170669145704411,3324648277099157

%N Smallest twin prime in a sequence of exactly n disjoint twin pairs, sandwiched between non-twins.

%H C. Rivera, <a href="http://www.primepuzzles.net/puzzles/puzz_122.htm">Prime Puzzles</a>

%e The first sequence of primes containing exactly 1 pair of twins, sandwiched between non-twins, is 29, 31. The first containing exactly 2 disjoint pairs similarly sandwiched is 101, 103, 107, 109. The first containing exactly 3 disjoint pairs similarly sandwiched is 179, 181, 191, 193, 197, 199. So the sequence starts 29, 101, 179.

%Y Cf. A035789, A035790, A035791.

%K nonn,more

%O 1,1

%A _Neil Fernandez_, Mar 25 2002

%E More terms from Lévai Gábor (gablevai(AT)vipmail.hu), Jan 11 2005

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Last modified August 10 23:32 EDT 2024. Contains 375059 sequences. (Running on oeis4.)