A147797 The 10^n-th twin prime, A001097(10^n).

3, 41, 1607, 32441, 557729, 8265137, 115438691, 1523976761, 19358094101, 239211161009, 2891512532927, 34338035342339, 401888325140039, 4646528385435887

Offset: 0

Author

M. F. Hasler, Dec 06 2008

Keywords

• more
• nonn

Comments

Since A001097(2)=5 is the only number to be member of two twin prime pairs, all terms of this sequence are lower twin primes A001359(k), k = 1,6,51,501,5001,..., cf. the given formula.

Crossrefs

Cf. A146214.

Formula

a(n) = A001359([10^n/2]+1)

Extensions

a(6)-a(13) from Donovan Johnson, Dec 18 2009