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 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

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Last modified May 5 19:31 EDT 2021. Contains 343573 sequences. (Running on oeis4.)