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 A228547 y-values in the solution to the Pell equation x^2 - 74*y^2 = -1. 2
 5, 36985, 273615025, 2024203917965, 14975060311490045, 110785494160199434945, 819591070822095108233065, 6063334631156365450508779925, 44856548781703720780768845652085, 331848741823709495179762469625344905 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS All terms are multiples of 5. LINKS Colin Barker, Table of n, a(n) for n = 1..250 Index entries for linear recurrences with constant coefficients, signature (7398,-1). FORMULA a(n) = 7398*a(n-1)-a(n-2). G.f.: -5*(x-1) / (x^2-7398*x+1). MATHEMATICA LinearRecurrence[{7398, -1}, {5, 36985}, 20] (* Harvey P. Dale, Jan 14 2015 *) PROG (PARI) Vec(-5*(x-1)/(x^2-7398*x+1) + O(x^30)) CROSSREFS Cf. A228546 gives the corresponding x-values. Sequence in context: A246870 A193366 A347934 * A193148 A307492 A355959 Adjacent sequences: A228544 A228545 A228546 * A228548 A228549 A228550 KEYWORD nonn,easy AUTHOR Colin Barker, Aug 25 2013 STATUS approved

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Last modified January 27 19:47 EST 2023. Contains 359846 sequences. (Running on oeis4.)