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A125962
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Numbers whose base 9 representation is 555555555......5.
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0
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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; refs; listen; history; internal format)
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OFFSET
| 0,2
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FORMULA
| a(n)=(9^n-1)*5/8
a(n)=9*a(n-1)+5 (with a(0)=0) [From Vincenzo Librandi (vincenzo.librandi(AT)tin.it), Sep 30 2010]
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EXAMPLE
| For n=1, a(1)=9*0+5=5; n=2, a(2)=9*5+5=50; n=3, a(3)=9*50+5=455 [From Vincenzo Librandi (vincenzo.librandi(AT)tin.it), Sep 30 2010]
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MATHEMATICA
| FromDigits[#, 9]&/@ Table[PadRight[{5}, n, 5], {n, 0, 20}] [From Harvey P. Dale, Jan. 27, 2011]
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CROSSREFS
| Sequence in context: A060347 A133646 A043032 * A136915 A136918 A136910
Adjacent sequences: A125959 A125960 A125961 * A125963 A125964 A125965
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KEYWORD
| easy,nonn
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AUTHOR
| Zerinvary Lajos (zerinvarylajos(AT)yahoo.com), Feb 03 2007
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