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

0,1

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.

Links

Table of n, a(n) for n=0..13.

Formula

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

Crossrefs

Cf. A146214.

Sequence in context: A012147 A012011 A277453 * A139161 A262644 A238990

Adjacent sequences: A147794 A147795 A147796 * A147798 A147799 A147800

Keyword

more,nonn

Author

M. F. Hasler, Dec 06 2008

Extensions

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

Status

approved