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%I #12 Apr 11 2021 03:00:23
%S 2,30,156,2088,24480,314158,1570792,15697800,142466688,2074821104,
%T 20847434400,157079632678,2899112679360,31222486232352,
%U 306850390136136,2887898768697600,13458068181774720,314159264051394168
%N Euler's totient of floor(Pi*10^n), Pi=3.14....
%F a(n) = A000010(A011545(n)).
%t Table[EulerPhi[Floor[Pi*10^n]],{n,0,20}] (* _Harvey P. Dale_, Dec 21 2015 *)
%Y Cf. A000796, A000010, A011545.
%K nonn
%O 0,1
%A _Reinhard Zumkeller_, Oct 30 2003