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 A056669 #8 May 19 2024 12:46:43 %S A056669 80,1271126683458,56713727820157015040139002378207625216, %T A056669 391831450274095835989578845740748572507778319772471971788263545022346079349517822265625, %U A056669 200686811274705851367015009476213900556122115576242204059686870190836815007216055889993135664840027801272974569041030260103375717453629833465368932436741614903498899456 %N A056669 Number of equivalence classes of n-valued Post functions of 3 variables under action of symmetric group S_3. %H A056669 M. A. Harrison and R. G. High, <a href="https://doi.org/10.1016/S0021-9800(68)80008-0">On the cycle index of a product of permutation groups</a>, J. Combin. Theory, 4 (1968), 277-299. See p. 295. %Y A056669 Cf. A000616, A001321, A001323, A001324. %K A056669 nonn %O A056669 2,1 %A A056669 _Vladeta Jovovic_, Aug 09 2000