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A144930
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Numbers k arising in A144929.
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6
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1, 109, 11989, 1318681, 145042921, 15953402629, 1754729246269, 193004263686961, 21228714276319441, 2334965566131451549, 256824983560183350949, 28248413226054037152841, 3107068629882383903461561, 341749300873836175343618869, 37589316027492096903894614029
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OFFSET
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1,2
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COMMENTS
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Numbers n such that there exists x in N : (x+1)^3 - x^3 = 7*n^2. - Richard Choulet, Oct 16 2008
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REFERENCES
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E.-A. Majol, Note #2228, L'Intermédiaire des Mathématiciens, 9 (1902), pp. 183-185. - N. J. A. Sloane, Mar 03 2022
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LINKS
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FORMULA
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EXAMPLE
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MATHEMATICA
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LinearRecurrence[{110, -1}, {1, 109}, 20] (* Harvey P. Dale, Oct 05 2016 *)
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PROG
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(PARI) Vec(-x*(x-1)/(x^2-110*x+1) + O(x^20)) \\ Colin Barker, Jul 14 2016
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CROSSREFS
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KEYWORD
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easy,nonn
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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