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 A255942 #9 Feb 08 2020 07:01:18 %S A255942 2,8,23,56,127,268,547,1072,2055,3836,7045,12692,22566,39542,68520, %T A255942 117354,199082,334446,557175,920528,1509606,2457698,3974813,6387026, %U A255942 10201990,16201424,25589505,40205766,62857564,97800674,151475564,233575222,358656011,548476318 %N A255942 Number of collections of nonempty multisets with a total of n objects of exactly two colors. %H A255942 Vaclav Kotesovec, <a href="/A255942/b255942.txt">Table of n, a(n) for n = 2..10000</a> (terms 2..1000 from Alois P. Heinz) %F A255942 a(n) = A255903(n,2). %Y A255942 Column k=2 of A255903. %K A255942 nonn %O A255942 2,1 %A A255942 _Alois P. Heinz_, Mar 11 2015