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A174855
y-values in the solution to x^2-51*y^2=1.
2
0, 7, 700, 69993, 6998600, 699790007, 69972002100, 6996500419993, 699580069997200, 69951010499300007, 6994401469860003500, 699370195975501049993, 69930025196080244995800
OFFSET
1,2
COMMENTS
The corresponding values of x of this Pell equation are in A174756.
FORMULA
a(n) = 100*a(n-1)-a(n-2) with a(1)=0, a(2)=7.
G.f.: 7*x^2/(1-100*x+x^2).
MATHEMATICA
LinearRecurrence[{100, -1}, {0, 7}, 230]
PROG
(Magma) I:=[0, 7]; [n le 2 select I[n] else 100*Self(n-1)-Self(n-2): n in [1..20]]
CROSSREFS
Cf. A174756.
Sequence in context: A144957 A163016 A261696 * A186160 A129291 A229149
KEYWORD
nonn,easy
AUTHOR
Vincenzo Librandi, Apr 15 2010
STATUS
approved