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A136008
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a(n) = n^6 - n^2.
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0
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0, 0, 60, 720, 4080, 15600, 46620, 117600, 262080, 531360, 999900, 1771440, 2985840, 4826640, 7529340, 11390400, 16776960, 24137280, 34011900, 47045520, 63999600, 85765680, 113379420, 148035360, 191102400, 244140000, 308915100
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,3
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FORMULA
| G.f.: (60*x^5 + 300*x^4 + 300*x^3 + 60*x^2)/(-x^7 + 7*x^6 - 21*x^5 + 35*x^4 - 35*x^3 + 21*x^2 - 7*x + 1) - Alexander R. Povolotsky (pevnev(AT)juno.com), Apr 01 2008
a(n) = A001014(n)-A000290(n). [From Omar E. Pol (info(AT)polprimos.com), Dec 26 2008]
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MATHEMATICA
| f[n_]:=n^6-n^2; f[Range[0, 60]] (*From Vladimir Joseph Stephan Orlovsky, Feb 10 2011*)
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PROG
| sage: [lucas_number1(3, n^3, n^2) for n in xrange(0, 31)] - Zerinvary Lajos (zerinvarylajos(AT)yahoo.com), Jul 16 2008
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CROSSREFS
| Cf. A000290, A001014. [From Omar E. Pol (info(AT)polprimos.com), Dec 26 2008]
Sequence in context: A081384 A099344 A088945 * A000555 A034865 A138409
Adjacent sequences: A136005 A136006 A136007 * A136009 A136010 A136011
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KEYWORD
| easy,nonn
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AUTHOR
| Rolf Pleisch (r_pleisch(AT)gmx.ch), Mar 16 2008
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EXTENSIONS
| Extended by Ray Chandler (rayjchandler(AT)sbcglobal.net), Dec 13 2008
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