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 A359526 #5 Jan 05 2023 11:04:45 %S A359526 1,2,10,44,283,1922,14163,107771,841846 %N A359526 Number of unbiased (balanced) free polyiamonds with 2n cells. %C A359526 Define the bias of a polyiamond to be the difference between the number of black triangles and the number of white triangles when chessboard coloring is applied to the polyiamond. Unbiased polyiamonds are those having an equal number of black and white triangles. The sequence is defined for 2n rather than n as odd-sized polyiamonds are obviously biased. %Y A359526 Cf. A000577, A234012. %K A359526 nonn,more %O A359526 1,2 %A A359526 _John Mason_, Jan 05 2023