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 A121324 Number of digits in quotient {R_(n*R_n)}/(R_n)^2, where R_n=A002275(n),n*R_n=A053422(n). 0
 1, 19, 328, 4437, 55546, 666655, 7777764, 88888873, 999999982, 11111111091, 122222222200, 1333333333309, 14444444444418, 155555555555527, 1666666666666636, 17777777777777745, 188888888888888854, 1999999999999999963 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 LINKS Table of n, a(n) for n=1..18. FORMULA a(n)=round[log_10{9*(10^(n*(10^n - 1)/9) - 1)/(10^n - 1)^2}] MATHEMATICA f[n_] := Floor[n(10^n - 1)/9 - 2n + Log[10, 9] + If[n == 1, 2, 1]]; Array[f, 18] (* Robert G. Wilson v, Aug 27 2006 *) CROSSREFS Sequence in context: A015676 A098304 A014900 * A093973 A345963 A202043 Adjacent sequences: A121321 A121322 A121323 * A121325 A121326 A121327 KEYWORD nonn,base AUTHOR Lekraj Beedassy, Aug 26 2006 EXTENSIONS More terms from Robert G. Wilson v, Aug 27 2006 STATUS approved

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Last modified July 16 10:27 EDT 2024. Contains 374345 sequences. (Running on oeis4.)