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 A268573 #10 Jun 09 2024 09:04:04 %S A268573 0,0,2,1,4,6,24,73,322,1274 %N A268573 Number of irreducible indecomposable bicolored immersions of unoriented circle into oriented sphere with n double points. %H A268573 Robert Coquereaux and Jean-Bernard Zuber, <a href="https://doi.org/10.1142/S0218216516500474">Maps, immersions and permutations</a>, Journal of Knot Theory and Its Ramifications, Vol. 25, No. 8 (2016), 1650047; <a href="https://arxiv.org/abs/1507.03163">arXiv preprint</a>, arXiv:1507.03163 [math.CO], 2015-2016. See Table 7. %F A268573 a(2*n) = A264761(2*n), a(2*n+1) = 2 * A264760(2*n+1). - _Andrey Zabolotskiy_, Jun 05 2024 %Y A268573 Cf. A264760, A264761, A268561, A268572. %K A268573 nonn,more %O A268573 1,3 %A A268573 _N. J. A. Sloane_, Mar 03 2016 %E A268573 Name clarified by _Andrey Zabolotskiy_, Jun 08 2024