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 A330529 #13 Feb 01 2022 00:31:01 %S A330529 0,0,4,10,30,48,170,710,2492 %N A330529 Number of quasi-magic (only long lines are magic) knight's tours on a 4 X 2n board. %C A330529 A quasi-magic tour is a special type of semi-magic tour in which the non-magic lines add to only two different values. Such tours are of interest on boards where magic tours don't exist. %H A330529 G. P. Jelliss, <a href="https://www.mayhematics.com/j/gpj26.htm">Quasi-Magic Tours</a>, The Games and Puzzles Journal #26, April-June 2003. %H A330529 Awani Kumar, <a href="https://arxiv.org/abs/1802.09340">Studies in Tours of Knight on Rectangular Boards</a>, arXiv:1802.09340 [math.GM], 2018. %e A330529 Example of 4 X 14 quasi-magic knight's tour. All long lines sum to 399 and the short lines sum to either 112 or 126. %e A330529 3 52 19 40 1 50 21 42 13 48 23 30 11 46 %e A330529 18 39 2 51 20 41 14 49 22 29 12 47 24 31 %e A330529 53 4 37 16 55 6 35 28 43 8 33 26 45 10 %e A330529 38 17 54 5 36 15 56 7 34 27 44 9 32 25 %Y A330529 Cf. A328816, A329370, A329483. %K A330529 nonn,hard,more %O A330529 1,3 %A A330529 _Awani Kumar_, Dec 17 2019