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 A346848 #12 Jul 23 2025 16:03:12 %S A346848 1,3,11,30,81,198,477,1089,2451,5358,11567,24537,51577,107205,221378, %T A346848 453900,926395,1882152,3812232,7699191,15518112,31220991,62733296, %U A346848 125911851,252516626,506082933,1013780968,2029989807,4063678159,8132877129,16274093175 %N A346848 Number of conjugacy classes of the symplectic group Sp(2n, 2) over the field with 2 elements. %C A346848 Sp(2n, 2) is isomorphic to the orthogonal group O(2n+1, 2) over the field with 2 elements, and is a simple and complete group for n>=3. %H A346848 Jan Kristian Haugland, <a href="/A346848/b346848.txt">Table of n, a(n) for n = 0..1000</a> %H A346848 G. E. Wall, <a href="https://doi.org/10.1017/S1446788700027622">On the conjugacy classes in the unitary, symplectic and orthogonal groups</a>, J. Aust. Math. Soc., 3 (1963), 1-62. %e A346848 a(2)=11, and Sp(4, 2) is isomorphic to the symmetric group S_6 which has 11 conjugacy classes. %Y A346848 Discrete convolution of A070933 and A098613. A003923 gives the order of the group. %K A346848 nonn %O A346848 0,2 %A A346848 _Jan Kristian Haugland_, Aug 06 2021