A088463 Upper twin primes of upper twin prime index.

31, 61, 181, 283, 811, 1279, 1999, 2551, 3931, 4159, 5659, 6553, 8389, 9241, 9463, 11551, 12253, 14629, 15889, 17923, 20509, 26113, 27109, 29401, 33829, 37993, 41179, 42571, 44623, 46681, 59671, 61333, 62143, 65449, 67759, 81019, 82009

Offset

1,1

Links

Amiram Eldar, Table of n, a(n) for n = 1..10000

Formula

a(n) = A006512(A006512(n)).

a(n) == 1 (mod 6).

Prog

(PARI) a(k) = { for(x1=1, k, y1=twinu(twinu(x1)); print1(y1", ") ) }
twin(n) = { c=0; x=1; while(c<n, if(isprime(prime(x)+2), c++); x++; ); return(prime(x)) }

Crossrefs

Cf. A006512, A088460, A007097.

Sequence in context: A225874 A139892 A088464 * A195745 A078855 A053430

Adjacent sequences: A088460 A088461 A088462 * A088464 A088465 A088466

Keyword

nonn

Author

Cino Hilliard, Nov 12 2003

Extensions

Edited by David W. Wilson, Oct 29 2006

Status

approved