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Search: id:A017897
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| A017897 |
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Expansion of 1/((1-3x)(1-5x)(1-9x)). |
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+0
1
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| 1, 17, 202, 2090, 20251, 189707, 1745332, 15900020, 144066901, 1301455397, 11737424062, 105758621150, 952437144751, 8574983669087, 77190104636392, 694787214149480, 6253466332501801, 56283104147438777
(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) = term (1,1) in the 3x3 matrix [17,1,0; -87,0,1; 135,0,0]^n. [From Alois P. Heinz (heinz(AT)hs-heilbronn.de), Aug 04 2008]
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MAPLE
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(Maple) a := n -> (Matrix(3, (i, j)-> if (i=j-1) then 1 elif j=1 then [17, -87, 135][i] else 0 fi)^n)[1, 1]; seq (a(n), n=0..17); [From Alois P. Heinz (heinz(AT)hs-heilbronn.de), Aug 04 2008]
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CROSSREFS
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Adjacent sequences: A017894 A017895 A017896 this_sequence A017898 A017899 A017900
Sequence in context: A021134 A065895 A009479 this_sequence A016311 A140961 A016306
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KEYWORD
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nonn
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AUTHOR
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njas
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