A072101 Continued fraction expansion of Product_{p prime} (1 - 1/(p^2-1)).

0, 1, 1, 7, 1, 1, 1, 3, 1, 1, 7, 1, 15, 1, 1, 5, 1, 1, 6, 1, 1, 12, 2, 1, 52, 6, 3, 2, 1, 7, 1, 1, 4, 2, 1, 5, 1, 1, 1, 7, 2, 1, 5, 1, 13, 3, 1, 1, 4161, 1, 1, 1, 9, 4, 6, 1, 12, 2, 9, 3, 1, 4, 3, 1, 6, 3, 2, 1, 3, 4, 2, 2, 3, 93, 3, 1, 10, 1, 2, 1, 7, 4, 4, 2, 1, 1, 2, 2, 10, 1, 1, 2, 3, 3, 1, 1, 3, 1

Offset

0,4

Links

Table of n, a(n) for n=0..97.

Gerhard Niklasch, Some number-theoretical constants: 1000-digit values.

Mathematica

(* c= the value at the link above; *) ContinuedFraction[c, 100]

Prog

(PARI) contfrac(prodeulerrat(1 - 1/(p^2-1))) \\ Amiram Eldar, Mar 13 2021

Crossrefs

Cf. A065469.

Sequence in context: A168423 A350071 A336844 * A366894 A088840 A348048

Adjacent sequences: A072098 A072099 A072100 * A072102 A072103 A072104

Keyword

cofr,nonn

Author

Robert G. Wilson v, Jun 18 2002

Status

approved