%N Index of first occurrence of exactly n consecutive twos in a row in the decimal expansion of Pi.
%C Presently identical to A050281, but it can be expected that the two will eventually differ, namely, as soon as a(n) > a(n+1) and A050281(n) = A050281(n+1).
%C a(10) > 2*10^9, according to the SubIdiom.com search engine. - _M. F. Hasler_, Apr 13 2019
%C a(11) > 99*10^9. - _Giovanni Resta_, Oct 02 2019
%H David G. Andersen, <a href="http://www.angio.net/pi/piquery">The Pi-Search Page</a>.
%H Peter Trüb, <a href="https://pi2e.ch/blog/2017/03/10/pi-digits-download/">22.4 trillion digits of pi</a>
%e Pi = 3.1415926... has a "run" of exactly one '2' in the 6th place after the decimal point, therefore a(1) = 6.
%Y Cf. A050281, A035117, A096757, A096758, A096759, A096760, A096761, A096762, A096763, A050279.
%A _Robert G. Wilson v_, Jul 07 2004
%E a(10) from _Giovanni Resta_, Oct 02 2019