The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A208151 Decimal expansion of 3344161/1494696. 2
 2, 2, 3, 7, 3, 5, 1, 9, 4, 3, 1, 3, 7, 6, 0, 1, 2, 2, 4, 5, 9, 6, 8, 4, 1, 0, 9, 6, 7, 8, 4, 8, 9, 8, 0, 6, 6, 2, 2, 8, 8, 5, 1, 8, 8, 6, 9, 3, 8, 8, 8, 2, 5, 5, 5, 3, 8, 2, 4, 9, 9, 1, 8, 3, 7, 8, 0, 5, 1, 4, 5, 6, 6, 1, 7, 2, 6, 5, 3, 1, 6, 8, 2, 6, 9, 6, 6, 8, 2, 1, 3, 4, 6, 9, 4, 9, 4, 8, 0, 0, 2, 8, 0, 4, 5 (list; constant; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS 3344161/1494696 is a rational number r such that both r^2 + 5 and r^2 - 5 are the squares of rational numbers because r^2 + 5 = (4728001/1494696)^2 and r^2 - 5 = (113279/1494696)^2. 2, 2, 3, 7 followed by repetitions of a period 210 sequence. REFERENCES J. Svoboda, L'intermédiaire des math., 21, 1914, pp. 176-178. LINKS Arkadiusz Wesolowski, Table of n, a(n) for n = 1..1000 Alessandro Padoa, Un duplice sistema indeterminato, Atti del Congresso Internazionale dei Matematici Bologna 3-10 Settembre 1928 (VI) Tomo II, Comunicazioni Sezione I (A-B), pp. 25-30. EXAMPLE 3344161/1494696 = 2.237351943137601224596841096.... MATHEMATICA RealDigits[N[3344161/1494696, 200]][[1]] PROG (PARI) default(realprecision, 200); x=3344161/1494696; for(n=1, 200, d=floor(x); x=(x-d)*10; print1(d, ", ")); CROSSREFS Sequence in context: A296019 A134232 A123934 * A203362 A183407 A222838 Adjacent sequences:  A208148 A208149 A208150 * A208152 A208153 A208154 KEYWORD cons,easy,nonn AUTHOR Arkadiusz Wesolowski, Feb 27 2012 STATUS approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified September 20 16:50 EDT 2021. Contains 347586 sequences. (Running on oeis4.)