This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A089286 #15 Mar 14 2025 20:17:47
%S A089286 3,31,159,352,169,314159,392701,10166,7995,9787003,28954814,
%T A089286 157079632681,68250087,4349287,67757089,1002742628275,1230782,
%U A089286 1307585156,14846149,1296180,1024025943,452477425,1492388104,381315143079137,989849547461,841346597336054828
%N A089286 Sum of distinct prime factors of floor(Pi*10^n), Pi=3.14....
%H A089286 Tyler Busby, <a href="/A089286/b089286.txt">Table of n, a(n) for n = 0..200</a>
%F A089286 a(n) = A008472(A011545(n)).
%e A089286 n=6: floor(Pi*10^6) = 3141592 = 2*2*2*392699: a(6) = 2 + 392699 = 392701.
%t A089286 Table[Total[FactorInteger[Floor[Pi 10^n]][[;;,1]]],{n,0,30}] (* _Harvey P. Dale_, Sep 02 2023 *)
%Y A089286 Cf. A089287, A089285, A089282, A000796.
%K A089286 nonn
%O A089286 0,1
%A A089286 _Reinhard Zumkeller_, Oct 30 2003
%E A089286 a(23)-a(25) from _Tyler Busby_, Mar 14 2025