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Search: id:A016321
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| A016321 |
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Expansion of 1/((1-2x)(1-9x)(1-10x)). |
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+0
6
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| 1, 21, 313, 4065, 49081, 566721, 6350473, 69654225, 751887961, 8016991521, 84652923433, 886876310385, 9231886792441, 95586981129921, 985282830165193, 10117545471478545, 103557909243290521, 1057021183189581921
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OFFSET
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0,2
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FORMULA
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a(n) = (10^n - 2^n)/8-(9^n - 2^n)/7, n>=2 . a(n) = A016134-A016133 for 2 to . [From Zerinvary Lajos (zerinvarylajos(AT)yahoo.com), Jun 05 2009]
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EXAMPLE
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if n=5 then 12496 - 8431 = 4065 [From Zerinvary Lajos (zerinvarylajos(AT)yahoo.com), Jun 05 2009]
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PROGRAM
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(Other) sage: [(10^n - 2^n)/8-(9^n - 2^n)/7 for n in xrange(2, 20)] # [From Zerinvary Lajos (zerinvarylajos(AT)yahoo.com), Jun 05 2009]
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CROSSREFS
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A016133, A016134 [From Zerinvary Lajos (zerinvarylajos(AT)yahoo.com), Jun 05 2009]
Sequence in context: A018054 A021484 A157088 this_sequence A019041 A021214 A016318
Adjacent sequences: A016318 A016319 A016320 this_sequence A016322 A016323 A016324
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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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