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 A098744 #14 Dec 18 2019 02:03:23 %S A098744 1,1,1,1,1,1,1,1,1,1,1,1,1,1,2,1,1,1,1,1,1,1,1,2,2,3,3,4,3,3,2,2,1,1, %T A098744 1,1,1,1,1,1,2,2,4,5,8,9,15,16,23,24,30,30,38,30,30,24,23,16,15,9,8,5, %U A098744 4,2,2,1,1,1,1 %N A098744 Triangle read by rows: row n gives the number of orbits of the group GA(n) acting on binary vectors of length 2^n and weight k, for n >= 0, 0 <= k <= 2^n. %C A098744 GA(n) is the general affine group, the automorphism group of the Reed-Muller code RM(r,n). %C A098744 Since the group is triply transitive, there's only one orbit for vectors of weight 0,1,2,3. %e A098744 Triangle begins: %e A098744 1 1 %e A098744 1 1 1 %e A098744 1 1 1 1 1 %e A098744 1 1 1 1 2 1 1 1 1 (the 2 is because there are two orbits on vectors of length 8 and weight 4) %e A098744 1 1 1 1 2 2 3 3 4 3 3 2 2 1 1 1 1 %Y A098744 Cf. A000214 (row sums). - _Vladeta Jovovic_, Feb 22 2009 %K A098744 nonn,tabf,more %O A098744 0,15 %A A098744 Alexander Vardy (avardy(AT)ucsd.edu), Nov 15 2008 %E A098744 More terms from _Vladeta Jovovic_, Feb 22 2009