

A175672


yvalues in the solution to x^2  28*y^2=1.


3



0, 24, 6096, 1548360, 393277344, 99890897016, 25371894564720, 6444361328541864, 1636842405555068736, 415751526649658917080, 105599250926607809869584, 26821793983831734047957256
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OFFSET

1,2


COMMENTS

The corresponding values of x of this Pell equation are in A175633.


LINKS

Vincenzo Librandi, Table of n, a(n) for n = 1..200
Index entries for linear recurrences with constant coefficients, signature (254,1).


FORMULA

a(n) = 254*a(n1)a(n2) with a(1)=0, a(2)=24.
G.f.: 24*x^2/(1254*x+x^2).


MATHEMATICA

LinearRecurrence[{254, 1}, {0, 24}, 20]


PROG

(MAGMA) I:=[0, 24]; [n le 2 select I[n] else 254*Self(n1)Self(n2): n in [1..15]];


CROSSREFS

Cf. A175633.
Sequence in context: A277001 A163576 A145408 * A181749 A266312 A181232
Adjacent sequences: A175669 A175670 A175671 * A175673 A175674 A175675


KEYWORD

nonn,easy,less


AUTHOR

Vincenzo Librandi, Dec 04 2010


STATUS

approved



