A131493 Values of n such that Pi^n starts with the digits n.
3, 226, 1837, 2163, 5358, 44857, 170788, 482721, 8918391, 36589396, 122394502, 1107852077, 10071260304, 22991513047, 81477190549, 422242473309, 4242315932866, 153777057499935, 282960008506695, 1683262946768556, 1099372130016731506, 1117679864051418714
Offset: 1
Examples
226 is a term of this sequence because Pi^226 = 226.9191... * 10^110, which starts with 226.
Programs
-
PARI
s=1;for(i=1,10000000,s=s*Pi; if(s-i>11,s=s/10,); if(floor(s)==i,printp1(i,", "),))
Extensions
a(10)-a(12) from Jon E. Schoenfield, Jul 17 2010
a(13)-a(22) from Max Alekseyev, Sep 12 2013