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A145323
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Numbers x such that there exists n in N : (x+1)^3-x^3=31*n^2
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22, 546817, 13288758862, 322943417329657, 7848170914656577702, 190726249245040733996497, 4635029301304809002926304542, 112640481889583219144074318995337
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,1
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FORMULA
| a(n+2)=24302*a(n+1)-a(n)+12150
a(n)=-(1/2)+(7/6)*sqrt(93)*{[12151+1260*sqrt(93)]^n*sqrt(93)-[12151-1260*sqrt(93)]^n }+(45/4)*{[12151+1260*sqrt(93)]^n+[12151-1260*sqrt(93)]^n}, with n>=0 [From Paolo P. Lava (paoloplava(AT)gmail.com), Nov 25 2008]
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EXAMPLE
| a(1)=22 because the first relation is : 23^3-22^3=31*7^2
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CROSSREFS
| Sequence in context: A060619 A092212 A013770 * A013816 A104789 A173101
Adjacent sequences: A145320 A145321 A145322 * A145324 A145325 A145326
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KEYWORD
| nonn
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AUTHOR
| Richard Choulet (richardchoulet(AT)yahoo.fr), Oct 07 2008
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