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 A056667 #9 May 19 2024 12:46:24 %S A056667 22,47093135946,886151997189981695113820646176823296, %T A056667 3134651602192766687916630765925989003578700185329945310286348103545655409509684765625, %U A056667 929105607753267830402847266093582872945009794334454648424476250883505063045211468786079180624616064970104635594329005644118117051244756456544404209339748566921547776 %N A056667 Number of equivalence classes of n-valued Post functions of 3 variables under action of semi-direct product of symmetric group S_3 and complementing group C(3,n). %D A056667 I. Strazdins, On the number of types of l-adic functions (in Russian), Proc. Riga Polytech. Inst. 10, No. 1 (1963), 167-186. %H A056667 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. 296. %Y A056667 Cf. A000616, A001321, A001323, A001324. %K A056667 nonn %O A056667 2,1 %A A056667 _Vladeta Jovovic_, Aug 09 2000