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A145205
Numbers X such that (X^2-67)/201 is a square.
2
4154, 4279405106, 4408600346145986, 4541695990591853912234, 4678809792543413381498198474, 4820063060175757335495037232017826, 4965580763957784639661088992670945968466
OFFSET
1,1
FORMULA
a(n) = 1030190*a(n-1) - a(n-2).
G.f.: -4154*x*(x-1)/(x^2-1030190*x+1). - Colin Barker, Aug 24 2012
a(n) = 2*A145207(n)/67. - Hugo Pfoertner, Apr 07 2024
EXAMPLE
The first relation is : 4154^2=201*293^2+67.
MATHEMATICA
LinearRecurrence[{1030190, -1}, {4154, 4279405106}, 10] (* Paolo Xausa, Jan 17 2024 *)
CROSSREFS
Cf. A145207.
Sequence in context: A072896 A052464 A161752 * A243025 A196494 A104824
KEYWORD
easy,nonn
AUTHOR
Richard Choulet, Oct 04 2008
STATUS
approved