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Search: id:A060788
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| A060788 |
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9*(n-2)^2 * (n^2 - 2*n - 1). |
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+0
1
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| 0, 18, 252, 1134, 3312, 7650, 15228, 27342, 45504, 71442, 107100, 154638, 216432, 295074, 393372, 514350, 661248, 837522, 1046844, 1293102, 1580400, 1913058, 2295612, 2732814, 3229632, 3791250, 4423068, 5130702, 5919984
(list; graph; listen)
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OFFSET
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2,2
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REFERENCES
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H. Brocard and T. Lemoyne: Courbes geometriques remarquables (courbes speciales) Planes et Gauches. Tome I, Paris: Albert Blanchard, 1967 [First publ. 1919]; see p. 135.
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LINKS
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Harry J. Smith, Table of n, a(n) for n=2,...,1000
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FORMULA
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G.f.: 18*x^3*(-1-9*x-3*x^2+x^3)/(x-1)^5. a(n)=5*a(n-1)-10*a(n-2)+10*a(n-3)-5*a(n-4)+a(n-5). [From R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Jul 15 2009]
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PROGRAM
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(PARI) { for (n=2, 1000, write("b060788.txt", n, " ", 9*(n - 2)^2 * (n^2 - 2*n - 1)); ) } [From Harry J. Smith (hjsmithh(AT)sbcglobal.net), Jul 11 2009]
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CROSSREFS
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Sequence in context: A154250 A154350 A001722 this_sequence A144708 A020528 A088924
Adjacent sequences: A060785 A060786 A060787 this_sequence A060789 A060790 A060791
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KEYWORD
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nonn
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AUTHOR
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Antreas P. Hatzipolakis (xpolakis(AT)otenet.gr), Apr 28 2001
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EXTENSIONS
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Extra ( removed from definition by Harry J. Smith (hjsmithh(AT)sbcglobal.net), Jul 11 2009
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