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A178370
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The trisection A178242(3n+2).
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1
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7, 25, 26, 44, 133, 187, 125, 161, 403, 493, 296, 350, 817, 943, 539, 611, 1375, 1537, 854, 944, 2077, 2275, 1241, 1349, 2923, 3157, 1700, 1826, 3913, 4183, 2231, 2375, 5047, 5353, 2834, 2996, 6325, 6667, 3509, 3689, 7747
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OFFSET
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0,1
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COMMENTS
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A178370(n-1)=-1, 7,25,26,44,133,187,125,
+ A177049 = 1, 5,14,55,91, 68, 95,253,
gives 0,12,39,81,135,201,282,378,
which are increasing multiples of 3.
a(n) mod 9 = period 4: repeat 7,7,8,8.
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LINKS
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Table of n, a(n) for n=0..40.
Index to sequences with linear recurrences with constant coefficients, signature (3,-6,10,-12,12,-10,6,-3,1).
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FORMULA
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A060819(2+3*n)*(A060819(7+3*n)=A176672(n+2)).
G.f.: ( -7-4*x+7*x^2-46*x^3+9*x^4-8*x^5-4*x^6-2*x^7+x^8 ) / ( (x-1)^3*(x^2+1)^3 ). - R. J. Mathar, Jan 16 2011
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CROSSREFS
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Sequence in context: A012777 A074783 A065658 * A034125 A196013 A075926
Adjacent sequences: A178367 A178368 A178369 * A178371 A178372 A178373
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KEYWORD
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nonn,easy
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AUTHOR
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Paul Curtz, Dec 21 2010
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STATUS
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approved
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