A228522 - OEIS

A228522

y-values in the solution to the Pell equation x^2 - 29*y^2 = -1.

13, 254813, 4994844413, 97908939928813, 1919211035489748013, 37620374619761100622013, 737434581377346058902950813, 14455192626538362826854541214413, 283350685127970406754656657981972813, 5554240115423283286666416982908089866013

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OFFSET

1,1

LINKS

Colin Barker, Table of n, a(n) for n = 1..200

Index entries for linear recurrences with constant coefficients, signature (19602,-1).

FORMULA

a(n) = 19602*a(n-1)-a(n-2).

G.f.: -13*x*(x-1) / (x^2-19602*x+1).

PROG

(PARI) Vec(-13*x*(x-1)/(x^2-19602*x+1) + O(x^100))

CROSSREFS

Cf. A228521 gives the corresponding x-values.

Sequence in context: A022547 A273217 A176119 * A274229 A013798 A055324

Adjacent sequences: A228519 A228520 A228521 * A228523 A228524 A228525

KEYWORD

nonn,easy

AUTHOR

Colin Barker, Aug 24 2013

STATUS

approved