A073561 Number of Fibonacci numbers F(k), k <= 10^n, whose initial digit is 5.

2, 8, 80, 792, 7918, 79182, 791817, 7918132

Offset

1,1

Links

Table of n, a(n) for n=1..8.

Formula

Lim as n -> inf. a(n)/10^n=log(6/5), where the base is 10. - Robert Gerbicz, Sep 05 2002

Example

a(2)=8 because there are 8 Fibonacci numbers up to 10^2 whose initial digit is 5.

Crossrefs

Sequence in context: A071254 A063528 A259705 * A258970 A230880 A361425

Adjacent sequences: A073558 A073559 A073560 * A073562 A073563 A073564

Keyword

base,nonn

Author

Shyam Sunder Gupta, Aug 15 2002

Extensions

More terms from Robert Gerbicz, Sep 05 2002

Status

approved