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A038398
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Concatenate first n cubes in reverse order.
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1
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1, 81, 2781, 642781, 125642781, 216125642781, 343216125642781, 512343216125642781, 729512343216125642781, 1000729512343216125642781, 13311000729512343216125642781, 172813311000729512343216125642781
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OFFSET
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1,2
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REFERENCES
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M. Bencze, L.Tutescu, Some Notions and Questions in Number Theory, Sequence 6.
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LINKS
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Table of n, a(n) for n=1..12.
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FORMULA
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a(n)=(n^3)*10^floor{1+log10[a(n-1)]}+a(n-1), with a(1)=1 - Paolo P. Lava, Jun 20 2008
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MAPLE
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P:=proc(i) local a, n; a:=1; print(1); for n from 2 by 1 to i do a:=n^3*10^floor(evalf(1+log10(a), 1000))+a; print(a); od; end: P(100); - Paolo P. Lava, Jun 20 2008
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CROSSREFS
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Sequence in context: A210128 A018223 A206660 * A205902 A143652 A017797
Adjacent sequences: A038395 A038396 A038397 * A038399 A038400 A038401
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KEYWORD
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nonn,base,easy
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AUTHOR
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M.I.Petrescu (mipetrescu(AT)yahoo.com)
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EXTENSIONS
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More terms from Andrew Gacek (andrew(AT)dgi.net), Feb 21 2000
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STATUS
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approved
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