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Search: id:A014832
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| A014832 |
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a(1)=1, a(n)=9*a(n-1)+n. |
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+0
3
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| 1, 11, 102, 922, 8303, 74733, 672604, 6053444, 54481005, 490329055, 4412961506, 39716653566, 357449882107, 3217048938977, 28953440450808, 260580964057288, 2345228676515609, 21107058088640499
(list; graph; listen)
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OFFSET
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1,2
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MAPLE
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a:=n->sum((9^(n-j)-1)/8, j=0..n): seq(a(n), n=1..18); - Zerinvary Lajos (zerinvarylajos(AT)yahoo.com), Jan 15 2007
a := n-> (Matrix ([[1, 0, 1], [1, 1, 1], [0, 0, 9]])^n)[2, 3]; seq(a(n), n=1..18); [From Alois P. Heinz (heinz(AT)hs-heilbronn.de), Aug 06 2008]
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CROSSREFS
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Sequence in context: A037700 A037609 A055150 this_sequence A048441 A099294 A081552
Adjacent sequences: A014829 A014830 A014831 this_sequence A014833 A014834 A014835
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KEYWORD
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nonn
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AUTHOR
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njas
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