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 A073557 Number of Fibonacci numbers F(k), k <= 10^n, whose initial digit is 1. 1
 3, 30, 301, 3011, 30103, 301031, 3010300, 30103001, 301029995, 3010299957 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS FORMULA Lim as n -> inf. a(n)/10^n=log(2), where the base is 10. - Robert Gerbicz, Sep 05 2002 EXAMPLE a(2) = 30 because there are 30 Fibonacci numbers up to 10^2 whose initial digit is 1. PROG (PARI) default(realprecision, 10^4); m=log((1+sqrt(5))/2); lista(nn) = {my(d=log(10)/m, r=log(sqrt(5))/m, s=log(5-sqrt(5))/m, t=0, u=1); for(n=1, nn, u=10*u; while(s

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Last modified June 18 18:17 EDT 2021. Contains 345120 sequences. (Running on oeis4.)