A073563 Number of Fibonacci numbers F(k), k <= 10^n, whose initial digit is 7.

0, 5, 56, 580, 5798, 57992, 579913, 5799197

Offset

1,2

Links

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

Formula

Lim as n -> inf. a(n)/10^n=log(8/7), where the base is 10. - Robert Gerbicz, Sep 05 2002

Example

a(2)=5 because there are 5 Fibonacci numbers up to 10^2 whose initial digit is 7.

Crossrefs

Sequence in context: A258490 A255953 A174249 * A006658 A221160 A006293

Adjacent sequences: A073560 A073561 A073562 * A073564 A073565 A073566

Keyword

base,nonn

Author

Shyam Sunder Gupta, Aug 15 2002

Extensions

More terms from Robert Gerbicz, Sep 05 2002

Status

approved