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 A174743 #9 Mar 20 2013 04:50:26 %S A174743 1,3,7,15,31,63,131,279,621,1469,3766,10694,34728,133582,636719, %T A174743 3955451,33664265,407703531,7147333784,180948983492,6537204164708, %U A174743 332740721681412,23627093701822296,2324803141466748032,315610211340647518667,58953876234603150481383 %N A174743 Partial sums of A076766. %C A174743 Number of inequivalent binary linear codes of length <= n. Also the total number of nonisomorphic binary matroids on an k-set for all k <= n. The subsequence of primes is: 3, 7, 31, 131. %e A174743 a(14) = 1 + 2 + 4 + 8 + 16 + 32 + 68 + 148 + 342 + 848 + 2297 + 6928 + 24034 + 98854 + 503137 = 636719 is prime. %Y A174743 Cf. A076766, A076831, A034328, A055545. %K A174743 nonn %O A174743 0,2 %A A174743 _Jonathan Vos Post_, Nov 30 2010