A277774 Decimal expansion of the prime triples constant, also known as Brun's constant B_{3a} = Sum (1/p + 1/(p+2) + 1/(p+6)) as p runs through the initial members of prime triples A022004.

1, 0, 9, 7, 8, 5, 1, 0, 3, 9, 6, 7, 9

Offset

1,3

Links

Table of n, a(n) for n=1..13.

Thomas R. Nicely, Prime Constellations Research Project (Mar 16 2010).

Example

1.097851039679...

Crossrefs

Cf. A022004, A065421, A194098, A213007, A277775.

Sequence in context: A081855 A019887 A163931 * A011359 A154827 A258942

Adjacent sequences: A277771 A277772 A277773 * A277775 A277776 A277777

Keyword

nonn,cons,hard,more

Author

Martin Renner, Oct 29 2016

Extensions

Offset corrected by Rick L. Shepherd, Nov 03 2016

Status

approved