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A016295
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Expansion of 1/((1-2x)(1-5x)(1-6x)).
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1
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1, 13, 117, 905, 6461, 43953, 289717, 1868425, 11861421, 74423393, 462815717, 2858273145, 17556537181, 107373722833, 654414852117, 3977351721065, 24118423433741, 145982106270273, 882250466222917
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OFFSET
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0,2
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LINKS
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FORMULA
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a(n) = 13*a(n-1) - 52*a(n-2) + 60*a(n-3), n >= 3.
a(n) = -5^(n+2)/3 + 9*6^n + 2^n/3. - R. J. Mathar, Mar 18 2011
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MATHEMATICA
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LinearRecurrence[{13, -52, 60}, {1, 13, 117}, 20] (* Harvey P. Dale, Mar 26 2016 *)
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PROG
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(Sage) [(6^n - 2^n)/4-(5^n - 2^n)/3 for n in range(2, 21)] # Zerinvary Lajos, Jun 05 2009
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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