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Search: id:A016311
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| A016311 |
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Expansion of 1/((1-2x)(1-7x)(1-8x)). |
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+0
6
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| 1, 17, 203, 2101, 20163, 184821, 1643251, 14298917, 122461955, 1036190485, 8684988819, 72248167173, 597363137827, 4914549713909, 40265910006707, 328773866154469, 2676717032006979, 21739418975585493
(list; graph; listen)
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OFFSET
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0,2
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FORMULA
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a(n) = (8^n - 2^n)/6-(7^n - 2^n)/5 , n>=2 . a(n) = A016131-A016130 for 2 to . [From Zerinvary Lajos (zerinvarylajos(AT)yahoo.com), Jun 05 2009]
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EXAMPLE
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if n=3 then 84 - 67 = 17 . if n=4 then 680 - 477 = 203 . etc... [From Zerinvary Lajos (zerinvarylajos(AT)yahoo.com), Jun 05 2009]
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PROGRAM
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(Other) sage: [(8^n - 2^n)/6-(7^n - 2^n)/5 for n in xrange(2, 21)] # [From Zerinvary Lajos (zerinvarylajos(AT)yahoo.com), Jun 05 2009]
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CROSSREFS
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A016130, A016131 [From Zerinvary Lajos (zerinvarylajos(AT)yahoo.com), Jun 05 2009]
Sequence in context: A065895 A009479 A017897 this_sequence A140961 A016306 A021092
Adjacent sequences: A016308 A016309 A016310 this_sequence A016312 A016313 A016314
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KEYWORD
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nonn
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AUTHOR
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N. J. A. Sloane (njas(AT)research.att.com).
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