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 A038082 #15 Dec 19 2015 09:59:11
%S A038082 1,1,1,2,2,2,2,2,1,1,1
%N A038082 Number of n-node rooted identity trees of height at most 3.
%H A038082 <a href="/index/Ro#rooted">Index entries for sequences related to rooted trees</a>
%t A038082 Drop[CoefficientList[Series[x(1+x)(1+x^2)(1+x^3)(1+x^4),{x,0,11}],x],1] (* _Geoffrey Critzer_, Aug 01 2013 *)
%Y A038082 Cf. A038081-A038093.
%K A038082 nonn,fini,full
%O A038082 1,4
%A A038082 _Christian G. Bower_, Jan 04 1999