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 A173270 #6 Jun 11 2017 16:50:36
%S A173270 1,3,4,6,9,15,24,42,72,128,227,413,748,1378,2539,4721,8801,16511,
%T A173270 31043,58637,111014,210872,401429,766151,1465021,2807197,5387992,
%U A173270 10359000,19945395,38458185,74248452,143522118,277737798,538038784,1043325199
%N A173270 Partial sums of A001037, the number of degree-n irreducible polynomials over GF(2).
%F A173270 a(n) = Sum_{i=0..n} A001037(i).
%Y A173270 Cf. A001037, A058943 and A102569 for initial terms of underlying sequence. See also A058947, A011260, A059966, A000031 (n-bead necklaces but may have period dividing n).
%K A173270 nonn
%O A173270 0,2
%A A173270 _Jonathan Vos Post_, Feb 14 2010