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 A166926 #14 Apr 08 2025 23:26:42
%S A166926 1,2,4,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
%T A166926 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
%U A166926 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0
%N A166926 A000004 preceded by 1, 2, 4.
%C A166926 Inverse binomial transform of A058331.
%F A166926 a(0) = 1, a(1) = 2, a(2) = 4, a(n) = 0 for n > 2.
%F A166926 G.f.: (1+2*x+4*x^2).
%F A166926 a(n) = 2^n mod 8. - _Ridouane Oudra_, Apr 08 2025
%o A166926 (PARI) {concat([1,2,4],vector(102))}
%Y A166926 Cf. A000004 (zero sequence), A058331 (2*n^2+1), A130706 (1, 2, 0, 0, 0, 0, ...), A130779 (1, 1, 2, 0, 0, 0, 0, ...).
%K A166926 easy,nonn
%O A166926 0,2
%A A166926 _Klaus Brockhaus_, Oct 23 2009