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 A187426 Decimal expansion of (3-phi)^2 = 10 - 5*phi where phi is the golden ratio. 7
 1, 9, 0, 9, 8, 3, 0, 0, 5, 6, 2, 5, 0, 5, 2, 5, 7, 5, 8, 9, 7, 7, 0, 6, 5, 8, 2, 8, 1, 7, 1, 8, 0, 9, 4, 1, 1, 3, 9, 8, 4, 5, 4, 1, 0, 0, 9, 7, 1, 1, 8, 5, 6, 8, 9, 3, 2, 2, 7, 5, 6, 8, 8, 6, 4, 7, 3, 6, 9, 7, 6, 8, 5, 9, 0, 5, 4, 8, 7, 7, 5, 1, 4 (list; constant; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS This is an integer in Q(sqrt(5)). - Wolfdieter Lang, Jan 07 2018 LINKS Ivan Panchenko, Table of n, a(n) for n = 1..1000 FORMULA (3-phi)^2 = 5/phi^2 = 10 - 5*phi. Smaller root of x^2 - 15x + 25 = 0. Equals 10*A187798-5. - R. J. Mathar, Feb 08 2023 EXAMPLE 1.909830... MATHEMATICA RealDigits[(3-GoldenRatio)^2, 10, 120][[1]] (* Harvey P. Dale, Jun 30 2017 *) PROG (PARI) (15-5*sqrt(5))/2 \\ Charles R Greathouse IV, Aug 31 2013 CROSSREFS Cf. A226765. Apart from the first digit the same as A187798. Sequence in context: A241290 A201298 A029687 * A226765 A132696 A176523 Adjacent sequences: A187423 A187424 A187425 * A187427 A187428 A187429 KEYWORD nonn,cons AUTHOR Joost Gielen, Aug 30 2013 EXTENSIONS Corrected and extended by Charles R Greathouse IV, Aug 31 2013 STATUS approved

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Last modified July 21 09:16 EDT 2024. Contains 374472 sequences. (Running on oeis4.)