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 A006759 M3038 #29 Dec 26 2023 06:38:38
%S A006759 0,0,0,3,17,131,915,6553,47026,341888,2505449,18534827,138224058,
%T A006759 1038594326,7856087894,59782042225,457359506070,3515816578512,
%U A006759 27143401299351,210372490707568
%N A006759 Number of one-sided strictly 3-dimensional polyominoes with n cells.
%D A006759 N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).
%H A006759 W. F. Lunnon, <a href="http://dx.doi.org/10.1093/comjnl/18.4.366">Counting multidimensional polyominoes</a>, Computer Journal 18 (4) (1975) 366-367.
%t A006759 A[s_Integer] := With[{s6 = StringPadLeft[ToString[s], 6, "0"]}, Cases[ Import["https://oeis.org/A" <> s6 <> "/b" <> s6 <> ".txt", "Table"], {_, _}][[All, 2]]];
%t A006759 A000105 = A@000105;
%t A006759 A000162 = A@000162;
%t A006759 a[n_] := A000162[[n]] - A000105[[n + 1]];
%t A006759 a /@ Range[16] (* _Jean-François Alcover_, Jan 16 2020 *)
%Y A006759 A column of A195738.
%K A006759 nonn,more
%O A006759 1,4
%A A006759 _N. J. A. Sloane_
%E A006759 a(11) corrected and a(13)-a(16) from A000162-A000105 by _Jean-François Alcover_, Jan 16 2020
%E A006759 Name clarified and a(17)-a(20) from A000162-A000105 by _John Mason_, Dec 26 2023