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A176020 Decimal expansion of (3+sqrt(15))/3. 3
2, 2, 9, 0, 9, 9, 4, 4, 4, 8, 7, 3, 5, 8, 0, 5, 6, 2, 8, 3, 9, 3, 0, 8, 8, 4, 6, 6, 5, 9, 4, 1, 3, 3, 2, 0, 3, 6, 1, 0, 9, 7, 3, 9, 0, 1, 7, 6, 3, 8, 6, 3, 6, 0, 8, 8, 6, 2, 5, 2, 4, 5, 8, 8, 7, 0, 4, 4, 9, 4, 3, 6, 3, 9, 7, 8, 9, 9, 3, 0, 1, 1, 1, 7, 3, 0, 9, 5, 7, 9, 2, 2, 8, 6, 2, 2, 4, 5, 0, 5, 9, 7, 2, 1, 0 (list; constant; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Continued fraction expansion of (3+sqrt(15))/3 is A010693.
a(n) = A020817(n-1) for n > 1; a(1) = 2.
LINKS
EXAMPLE
(3+sqrt(15))/3 = 2.29099444873580562839...
MATHEMATICA
RealDigits[(3+Sqrt[15])/3, 10, 120][[1]] (* Harvey P. Dale, May 20 2013 *)
CROSSREFS
Cf. A010472 (decimal expansion of sqrt(15)), A176016 (decimal expansion of (3+sqrt(15))/6), A010693 (repeat 2, 3), A020817 (decimal expansion of 1/sqrt(60)).
Sequence in context: A011148 A365307 A351400 * A048650 A125313 A199058
KEYWORD
cons,nonn
AUTHOR
Klaus Brockhaus, Apr 06 2010
STATUS
approved

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Last modified April 14 13:25 EDT 2024. Contains 371661 sequences. (Running on oeis4.)