A000882 Number of twin prime pairs <= product of first n primes.

0, 1, 4, 15, 69, 468, 4636, 57453, 896062, 18463713, 425177757, 11997649372, 385088898632, 13280323588034, 509456736126003

Offset: 1

Author

gandalf(AT)hrn.office.ssi.net (James D. Ausfahl)

Keywords

• nonn
• more
• hard

Links

• Tomás Oliveira e Silva, Tables of values of pi(x) and of pi2(x) [From _Donovan Johnson_, Mar 01 2010]

Crossrefs

Cf. A002110, A000849.

Extensions

More terms from David W. Wilson

a(10)-a(15) from Donovan Johnson, Mar 01 2010