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 A218440 #6 Dec 09 2018 13:32:13
%S A218440 10,135,1844,25145,342846,4674655,63738280,869062689,11849550290,
%T A218440 161566989191,2202943686300,30036834314425,409548106582534,
%U A218440 5584132130887935,76138873929651536,1038143078887634945,14154938162574828570,193000635905606023879,2631537137933532600580
%N A218440 Hankel transform of A078818.
%F A218440 G.f.: (10 - 5*x + 14*x^2 - x^3)/(1 - 14*x + 6*x^2 - 14*x^3 + x^4).
%t A218440 CoefficientList[Series[(10-5x+14x^2-x^3)/(1-14x+6x^2-14x^3+x^4),{x,0,30}],x] (* _Harvey P. Dale_, Dec 09 2018 *)
%Y A218440 Cf. A007272, A000447, A078818.
%K A218440 easy,nonn
%O A218440 0,1
%A A218440 _Arkadiusz Wesolowski_, Oct 28 2012