%I #15 Dec 19 2015 09:59:11
%S 1,1,1,2,2,2,2,2,1,1,1
%N Number of n-node rooted identity trees of height at most 3.
%H <a href="/index/Ro#rooted">Index entries for sequences related to rooted trees</a>
%t 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 Cf. A038081-A038093.
%K nonn,fini,full
%O 1,4
%A _Christian G. Bower_, Jan 04 1999