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 A222135 Decimal expansion of sqrt(5 - sqrt(5 - sqrt(5 - sqrt(5 - ... )))). 1
 1, 7, 9, 1, 2, 8, 7, 8, 4, 7, 4, 7, 7, 9, 2, 0, 0, 0, 3, 2, 9, 4, 0, 2, 3, 5, 9, 6, 8, 6, 4, 0, 0, 4, 2, 4, 4, 4, 9, 2, 2, 2, 8, 2, 8, 8, 3, 8, 3, 9, 8, 5, 9, 5, 1, 3, 0, 3, 6, 2, 1, 0, 6, 1, 9, 5, 3, 4, 3, 4, 2, 1, 2, 7, 7, 3, 8, 8, 5, 4, 4, 3, 3, 0, 2, 1, 8, 0, 7, 7, 9, 7, 4, 6, 7, 2, 2, 5, 1, 6, 3 (list; constant; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS Sequence with a(1) = 2 is decimal expansion of sqrt(5 + sqrt(5 + sqrt(5 + sqrt(5 + ... )))) - A222134. LINKS FORMULA Closed form: (sqrt(21) - 1)/2 = A090458-2 = A107905-3 = A222134-1. sqrt(5 - sqrt(5 - sqrt(5 - sqrt(5 - ... )))) + 1 = sqrt(5 + sqrt(5 + sqrt(5 + sqrt(5 + ... )))). See A222134. EXAMPLE 1.791287847477920003294023596864... MATHEMATICA RealDigits[(Sqrt[21] - 1)/2, 10, 130] CROSSREFS Cf. A090458, A107905, A222134. Sequence in context: A120670 A175638 A091900 * A086318 A244674 A130834 Adjacent sequences:  A222132 A222133 A222134 * A222136 A222137 A222138 KEYWORD nonn,cons AUTHOR Jaroslav Krizek, Feb 08 2013 STATUS approved

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Last modified December 13 06:15 EST 2018. Contains 318082 sequences. (Running on oeis4.)