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 A089301 #12 Jul 01 2025 19:23:22 %S A089301 1,1,1,1,3,76 %N A089301 Number of C-types (or contiguity types) of n-dimensional lattices. %D A089301 Ryskov, S. S., C-types of n-dimensional parallelohedra, Dokl. Akad. Nauk SSSR 212 (1973), 46-49. %D A089301 Ryskov, S. S. and Baranovskii, E. P., C-types of n-dimensional lattices and 5-dimensional primitive parallelohedra (with application to the theory of coverings), Trudy Mat. Inst. Steklov 137 (1976). English translation: Proc. Steklov Inst. Math. 1978, no. 4, 140 pp. %Y A089301 Cf. A071880, A071881, A071882. %K A089301 nonn,hard,nice %O A089301 0,5 %A A089301 _N. J. A. Sloane_, following a suggestion of _J. H. Conway_, Dec 26 2003