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

29, 101, 179, 9419, 909287, 325267931, 678771479, 1107819732821, 170669145704411, 3324648277099157

Offset

1,1

Links

Table of n, a(n) for n=1..10.

C. Rivera, Prime Puzzles

Example

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.

Crossrefs

Cf. A035789, A035790, A035791.

Sequence in context: A127464 A318959 A142109 * A142138 A341550 A009435

Adjacent sequences: A069469 A069470 A069471 * A069473 A069474 A069475

Keyword

nonn,more

Author

Neil Fernandez, Mar 25 2002

Extensions

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

Status

approved