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 A268565 #10 Jun 09 2024 09:04:21 %S A268565 1,1,5,15,97,592,4488,35314,295379 %N A268565 Number of achiral immersions of oriented circle into oriented sphere with 2n double points. %H A268565 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 Eq. (17), r_m. %F A268565 a(n) = 2 * A008988(2*n) - A008986(2*n). - _Andrey Zabolotskiy_, Jun 05 2024 %Y A268565 Cf. A008986, A008987, A268566. %K A268565 nonn,more %O A268565 0,3 %A A268565 _N. J. A. Sloane_, Mar 03 2016 %E A268565 Name clarified and a(0), a(6)-a(8) added using formula by _Andrey Zabolotskiy_, Jun 08 2024