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A114907
Decimal expansion of twice the twin primes constant defined in A005597.
8
1, 3, 2, 0, 3, 2, 3, 6, 3, 1, 6, 9, 3, 7, 3, 9, 1, 4, 7, 8, 5, 5, 6, 2, 4, 2, 2, 0, 0, 2, 9, 1, 1, 1, 5, 5, 6, 8, 6, 5, 2, 4, 6, 7, 2, 0, 5, 6, 9, 4, 6, 6, 8, 2, 6, 6, 3, 8, 8, 9, 6, 8, 4, 6, 6, 7, 0, 8, 1, 1, 2, 8, 4, 6, 0, 8, 9, 9, 0, 5, 5, 4, 2, 8, 7, 5, 2, 0, 0, 6, 2, 8, 2, 7, 6, 7, 9, 7, 3, 5, 8, 2
OFFSET
1,2
LINKS
Alexei Kourbatov, On the distribution of maximal gaps between primes in residue classes, arXiv:1610.03340 [math.NT], 2016-2018.
Eric Weisstein's World of Mathematics, Twin Primes Constant.
Eric Weisstein's World of Mathematics, Prime Constellation.
FORMULA
Equals 2*A005597 (in the sense of the corresponding decimal numbers).
EXAMPLE
1.320323631693739147855624220...
PROG
(PARI) 2 * prodeulerrat(1-1/(p-1)^2, 1, 3) \\ Amiram Eldar, Mar 16 2021
CROSSREFS
Cf. A005597.
Sequence in context: A286889 A286368 A190710 * A278499 A231132 A290327
KEYWORD
nonn,cons
AUTHOR
Eric W. Weisstein, Jan 06 2006
EXTENSIONS
Corrected offset and edited by M. F. Hasler, Dec 09 2008
STATUS
approved