1,1
The next term (17866..79237) has 186 digits.
Table of n, a(n) for n=1..5.
(PARI) fu(n) = p=1; for(x=1, n, p*=twinu(x); if(isprime(p+2), print1(p+2", "))) \The n-th upper twin prime twinu(n) = { local(c, x); c=0; x=1; while(c<n, if(isprime(prime(x)+2), c++); x++; ); return(prime(x)) }
Cf. A097490, A097491, A097492.
Sequence in context: A093168 A330388 A276231 * A341377 A082687 A117731
Adjacent sequences: A097490 A097491 A097492 * A097494 A097495 A097496
nonn
Cino Hilliard, Aug 24 2004
Edited by Don Reble, Apr 16 2007
approved
