The OEIS is supported by the many generous donors to the OEIS Foundation.

 Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 59th year, we have over 358,000 sequences, and we’ve crossed 10,300 citations (which often say “discovered thanks to the OEIS”). Other ways to Give
 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A175672 y-values in the solution to x^2 - 28*y^2=1. 3
 0, 24, 6096, 1548360, 393277344, 99890897016, 25371894564720, 6444361328541864, 1636842405555068736, 415751526649658917080, 105599250926607809869584, 26821793983831734047957256 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS The corresponding values of x of this Pell equation are in A175633. LINKS Vincenzo Librandi, Table of n, a(n) for n = 1..200 Index entries for linear recurrences with constant coefficients, signature (254,-1). FORMULA a(n) = 254*a(n-1)-a(n-2) with a(1)=0, a(2)=24. G.f.: 24*x^2/(1-254*x+x^2). MATHEMATICA LinearRecurrence[{254, -1}, {0, 24}, 20] PROG (Magma) I:=[0, 24]; [n le 2 select I[n] else 254*Self(n-1)-Self(n-2): n in [1..15]]; CROSSREFS Cf. A175633. Sequence in context: A277001 A163576 A145408 * A181749 A266312 A181232 Adjacent sequences: A175669 A175670 A175671 * A175673 A175674 A175675 KEYWORD nonn,easy,less AUTHOR Vincenzo Librandi, Dec 04 2010 STATUS approved

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

Last modified December 5 19:04 EST 2022. Contains 358588 sequences. (Running on oeis4.)