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A145694
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Numbers Y such that 57*Y^2+19 is a square
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0
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OFFSET
| 1,1
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FORMULA
| a(n+2)=302*a(n+1)-a(n)
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EXAMPLE
| a(1)=5 because the first relation is 38^2=57*5^2+19
a(n)=(5/2)*{[151+20*sqrt(57)]^n+[151-20*sqrt(57)]^n}-(1/3)*sqrt(57)*{[151-20*sqrt(57)]^n -[151+20*sqrt(57)]^n}, with n>=0 [From Paolo P. Lava (paoloplava(AT)gmail.com), Nov 25 2008]
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CROSSREFS
| A145120
Sequence in context: A062598 A203690 A169620 * A184970 A184973 A184971
Adjacent sequences: A145691 A145692 A145693 * A145695 A145696 A145697
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KEYWORD
| easy,nonn
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AUTHOR
| Richard Choulet (richardchoulet(AT)yahoo.fr), Oct 16 2008
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