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A174853
y-values in the solution to x^2-47*y^2=1.
2
0, 7, 672, 64505, 6191808, 594349063, 57051318240, 5476332201977, 525670840071552, 50458924314667015, 4843531063367961888, 464928523159009674233, 44628294692201560764480
OFFSET
1,2
COMMENTS
The corresponding values of x of this Pell equation are in A174755.
FORMULA
a(n) = 96*a(n-1)-a(n-2) with a(1)=0, a(2)=7.
G.f.: 7*x^2/(1-96*x+x^2).
MATHEMATICA
LinearRecurrence[{96, -1}, {0, 7}, 30]
PROG
(Magma) I:=[0, 7]; [n le 2 select I[n] else 96*Self(n-1)-Self(n-2): n in [1..20]];
CROSSREFS
Cf. A174755.
Sequence in context: A074282 A171737 A013568 * A228928 A332167 A038803
KEYWORD
nonn,easy
AUTHOR
Vincenzo Librandi, Apr 15 2010
STATUS
approved