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 A337456 #7 Sep 22 2020 01:47:54 %S A337456 1,6,30,126,534,2262,9534,40254,169302,702510,2929806,12222414, %T A337456 50908158,212134902,882794118,3654001326,15159263934,62906444238, %U A337456 260853828438,1081924309806,4484440327350 %N A337456 Number of n-step self-avoiding walks on a 3D cubic lattice where the walk consists of three different units and each unit cannot be adjacent to another unit of the same type. %C A337456 This is the 3-dimensional version of A337441; see that sequence for a description of the step rules. %H A337456 A. J. Guttmann, <a href="http://dx.doi.org/10.1088/0305-4470/20/7/029">On the critical behavior of self-avoiding walks</a>, J. Phys. A 20 (1987), 1839-1854. %Y A337456 Cf. A337441, A001412, A173380, A336492, A174319. %K A337456 nonn,walk,more %O A337456 1,2 %A A337456 _Scott R. Shannon_, Aug 27 2020