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Search: id:A125962
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| A125962 |
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Numbers whose base 9 representation is 555555555......5. |
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+0
1
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| 0, 5, 50, 455, 4100, 36905, 332150, 2989355, 26904200, 242137805, 2179240250, 19613162255, 176518460300, 1588666142705, 14297995284350, 128681957559155, 1158137618032400, 10423238562291605, 93809147060624450
(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)=(9^n-1)*5/8
a(n)=9*a(n-1)+5 (with a(1)=0) [From Vincenzo Librandi (vincenzo.librandi(AT)tin.it), Oct 30 2009]
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EXAMPLE
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For n=2, a(2)=9*0+5=5; n=3, a(3)=9*5+5=50; n=4, a(4)=9*50+5=455 [From Vincenzo Librandi (vincenzo.librandi(AT)tin.it), Oct 30 2009]
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CROSSREFS
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Sequence in context: A060347 A133646 A043032 this_sequence A136915 A136918 A136910
Adjacent sequences: A125959 A125960 A125961 this_sequence A125963 A125964 A125965
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KEYWORD
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easy,nonn
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AUTHOR
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Zerinvary Lajos (zerinvarylajos(AT)yahoo.com), Feb 03 2007
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