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A174750
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x-values in the solution to x^2-38*y^2=1.
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2
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1, 37, 2737, 202501, 14982337, 1108490437, 82013310001, 6067876449637, 448940843963137, 33215554576822501, 2457502097840901937, 181821939685649920837, 13452366034640253240001, 995293264623693089839237
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OFFSET
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1,2
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COMMENTS
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The corresponding values of y of this Pell equation are in A174777.
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LINKS
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FORMULA
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a(n) = 74*a(n-1)-a(n-2) with a(1)=1, a(2)=37.
G.f.: x*(1-37*x)/(1-74*x+x^2).
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MATHEMATICA
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LinearRecurrence[{74, -1}, {1, 37}, 30]
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PROG
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(Magma) I:=[1, 37]; [n le 2 select I[n] else 74*Self(n-1)-Self(n-2): n in [1..20]];
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CROSSREFS
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KEYWORD
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nonn,easy
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AUTHOR
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STATUS
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approved
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