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A053717
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a(n) = n^7 + n^6 + n^5 + n^4 + n^3 + n^2 + n + 1 = (n^8-1)/(n-1).
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4
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8, 255, 3280, 21845, 97656, 335923, 960800, 2396745, 5380840, 11111111, 21435888, 39089245, 67977560, 113522235, 183063616, 286331153, 435984840, 648232975, 943531280, 1347368421, 1891142968, 2613136835, 3559590240, 4785883225, 6357828776, 8353082583
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,1
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COMMENTS
| a(n) = 11111111 in base n.
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EXAMPLE
| a(3)=3280 because 11111111 base 3 =2187+729+243+81+27+9+3+1=3280
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MATHEMATICA
| Table[FromDigits["11111111", n], {n, 1, 30}] (* or *) Table[n^7+n^6+n^5+n^4+n^3+n^2+n+1, {n, 1, 60}] (* From Vladimir Joseph Stephan Orlovsky, Jan 29 2012 *)
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CROSSREFS
| Sequence in context: A138323 A162132 A171612 * A034674 A130034 A128787
Adjacent sequences: A053714 A053715 A053716 * A053718 A053719 A053720
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KEYWORD
| base,nonn
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AUTHOR
| Henry Bottomley (se16(AT)btinternet.com), Mar 23 2000
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