

A243955


a(n) is the starting position of the first occurrence of a string of n 9's in the decimal expansion of 2*Pi.


1




OFFSET

1,1


COMMENTS

This sequence denotes the position of the Feynman point in the digits of tau = 2*Pi, from a(3) to a(7). Note how compared with A048940, tau has a Feynman point one digit longer, and one position lower, because at this point, the decimal expansion of Pi is 499999987, giving 99999997 when multiplied by 2.


LINKS



EXAMPLE

The position of one consecutive 9 in 2*Pi=6.283185307179 is on the 12th decimal digit.


CROSSREFS



KEYWORD

nonn,base


AUTHOR



EXTENSIONS



STATUS

approved



