A159549 - OEIS

A159549

Decimal expansion of (201+20*sqrt(2))/199.

1, 1, 5, 2, 1, 8, 2, 2, 6, 7, 5, 7, 5, 1, 8, 5, 4, 3, 2, 0, 4, 0, 3, 7, 0, 7, 2, 6, 0, 5, 1, 2, 2, 5, 9, 3, 7, 5, 4, 4, 6, 9, 0, 6, 4, 0, 7, 4, 1, 4, 0, 1, 8, 1, 6, 3, 9, 9, 6, 6, 6, 3, 0, 5, 3, 2, 5, 7, 0, 1, 7, 5, 6, 6, 2, 9, 3, 5, 7, 4, 9, 1, 3, 4, 1, 7, 4, 7, 4, 9, 0, 8, 8, 7, 2, 0, 0, 1, 5, 8, 0, 6, 3, 8, 2

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OFFSET

1,3

COMMENTS

lim_{n -> infinity} b(n)/b(n-1) = (201+20*sqrt(2))/199 for n mod 3 = {1, 2}, b = A129993.

lim_{n -> infinity} b(n)/b(n-1) = (201+20*sqrt(2))/199 for n mod 3 = {0, 2}, b = A159548.

LINKS

G. C. Greubel, Table of n, a(n) for n = 1..10000

FORMULA

(201+20*sqrt(2))/199 = (20+sqrt(2))/(20-sqrt(2)).

EXAMPLE

(201+20*sqrt(2))/199 = 1.15218226757518543204...

MAPLE

with(MmaTranslator[Mma]): Digits:=100:

RealDigits(evalf((201+20*sqrt(2))/199))[1]; # Muniru A Asiru, Mar 31 2018

MATHEMATICA

RealDigits[(201+20*Sqrt[2])/199, 10, 100][[1]] (* G. C. Greubel, Mar 30 2018 *)

PROG

(PARI) (201+20*sqrt(2))/199 \\ G. C. Greubel, Mar 30 2018

(Magma) (201 + 20*Sqrt(2))/199 // G. C. Greubel, Mar 30 2018

CROSSREFS

Cf. A129993, A159548, A002193 (decimal expansion of sqrt(2)), A159550 (decimal expansion of (91443+58282*sqrt(2))/199^2).

Sequence in context: A188596 A199622 A156730 * A011394 A321289 A318380

Adjacent sequences: A159546 A159547 A159548 * A159550 A159551 A159552

KEYWORD

cons,nonn

AUTHOR

Klaus Brockhaus, Apr 14 2009

STATUS

approved