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A202280
y-values in the solutions to x^2 - 151*y^2 = 1.
0
0, 140634693, 486075138127903440, 1680019594496931198149880507, 5806645138782932871709060110684609120, 20069484831126506853711147766546649419638369093, 69366081749442007616768328339033006654521310003044446320
OFFSET
1,2
REFERENCES
A. H. Beiler, Recreations in the Theory of Numbers, Dover, NY, 1996, p. 248.
FORMULA
a(n) = 3456296080*a(n-1) - a(n-2) with a(1) = 0 and a(2) = 140634693.
G.f.: 140634693*x^2/(1 - 3456296080*x + x^2).
MATHEMATICA
LinearRecurrence[{3456296080, -1}, {0, 140634693}, 7]
CROSSREFS
Sequence in context: A257643 A262532 A075130 * A034611 A207798 A204806
KEYWORD
nonn,easy
AUTHOR
STATUS
approved