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 A361754 #13 Aug 01 2023 15:37:42 %S A361754 1,1,0,1,1,2,1,1,1,1,1,3,2,2,2,3,2,3,1,3,2,4,1 %N A361754 The number of free polyominoes of area n that fill their minimal enclosing circle (MEC). A polyomino "fills" its minimal enclosing circle if no square may be added to it that doesn't have some point outside of the circle. %H A361754 John Mason, <a href="/A361754/a361754.pdf">Illustrations</a> %e A361754 See link "Illustrations". %e A361754 a(3)=0 because (i) the minimal enclosing circle of the straight tromino also contains the cross pentomino, and (ii) the MEC of the L-shaped tromino also contains the square tetromino. %Y A361754 Cf. A147680. %K A361754 nonn,more %O A361754 1,6 %A A361754 _John Mason_ and _Allan C. Wechsler_, Mar 23 2023