A166462 Primes from twin prime pairs.

3, 3, 2, 5, 3, 3, 5, 5, 7, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 3, 3, 2, 2, 2, 3, 2, 3, 3, 3, 2, 3, 3, 2, 3, 3, 3, 2, 2

Offset

1,1

Comments

The terms are found by finding the digit sum of twin prime pairs and then dividing the digit sum by the total number of digits in the twin primes combined.

Links

Table of n, a(n) for n=1..105.

Chris Caldwell, The First 1,008 Twin Primes

Example

The digit sum of the twin primes pairs 41 and 43 is 12 which when divided by 4 gives 3, a prime, which is the first term in the sequence. The digit sum of the twin prime pairs 347 and 349 is 30 which when divided by 6 gives 5, a prime, which is the fourth term in the sequence. The digit sum of the twin prime pairs 431 and 433 is 18 which when divided by 6 gives 3, a prime, which is the fifth term in the sequence. The digit sum of the twin prime pairs 857 and 859 is 42 which when divided by 6 gives 7, a prime, which is the ninth term in the sequence.

Crossrefs

Cf. A001359

Sequence in context: A117937 A110897 A116644 * A328177 A320776 A279056

Adjacent sequences: A166459 A166460 A166461 * A166463 A166464 A166465

Keyword

base,nonn

Author

Parthasarathy Nambi, Oct 14 2009

Extensions

Terms beyond a(11) from R. J. Mathar, Jan 25 2010

Status

approved