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 A202481 #21 Mar 20 2023 13:51:12
%S A202481 1,10,55,231,833,2720,8280,23920,66352,178176,465920,1191680,2991360,
%T A202481 7389184,17999872,43315200,103116800,243138560,568393728,1318518784,
%U A202481 3037265920,6952058880,15820390400,35809918976,80659611648
%N A202481 Column k = 3 of triangular array in A165241.
%H A202481 Vincenzo Librandi, <a href="/A202481/b202481.txt">Table of n, a(n) for n = 0..1000</a>
%H A202481 <a href="/index/Rec#order_04">Index entries for linear recurrences with constant coefficients</a>, signature (8,-24,32,-16).
%F A202481 G.f.: (1+2x-x^2-x^3+x^4)/(1-2x)^4.
%F A202481 a(n) = A165241(n+3,3).
%F A202481 a(n) = 2^n*(n+3)*(3*n+2)*(3*n+5)/32 for n>0. - _Bruno Berselli_, Dec 21 2011
%t A202481 LinearRecurrence[{8,-24,32,-16},{1,10,55,231,833},30] (* _Harvey P. Dale_, Dec 04 2018 *)
%Y A202481 Cf. A011782, A084858, A165241, A202480
%K A202481 nonn,easy
%O A202481 0,2
%A A202481 _Philippe Deléham_, Dec 20 2011