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 A145335 Numbers n such that there exists x in N : (x+1)^3-x^3=43*n^2 0
 7, 235963, 7954312723, 268139881656367, 9038995402681818847, 304704534756264231676003, 10271589857594671847116242283, 346255293794811853210024295683927 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS FORMULA a(n+2)=33710*a(n+1)-a(n) a(n)=(7/2)*{[16855+1484*sqrt(129)]^n+[16855-1484*sqrt(129)]^n}-(53/172)*sqrt(129)*{[16855-1484*sqrt(129)]^n- [16855+1484*sqrt(129)]^n}, with n>=0 [From Paolo P. Lava, Nov 25 2008] EXAMPLE a(1)=7 because the first relation is : 27^3-26^3=43*7^2 CROSSREFS Sequence in context: A090769 A013842 A145322 * A003835 A138878 A050938 Adjacent sequences:  A145332 A145333 A145334 * A145336 A145337 A145338 KEYWORD easy,nonn AUTHOR Richard Choulet, Oct 08 2008 STATUS approved

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