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 A216342 #5 Jul 22 2025 23:31:23 %S A216342 5,114,4140,502658,99827160,37060650272,18383343930862, %T A216342 14216420433898186,13465808371086175084,18060513399132729563110 %N A216342 Number of horizontal and antidiagonal neighbor colorings of the even squares of a 6Xn array with new integer colors introduced in row major order. %C A216342 Row 6 of A216338 %e A216342 Some solutions for n=4 %e A216342 ..0..x..1..x....0..x..1..x....0..x..1..x....0..x..1..x....0..x..1..x %e A216342 ..x..2..x..0....x..0..x..2....x..0..x..2....x..0..x..2....x..0..x..2 %e A216342 ..0..x..3..x....3..x..4..x....2..x..3..x....3..x..4..x....3..x..0..x %e A216342 ..x..1..x..0....x..5..x..3....x..2..x..1....x..5..x..1....x..4..x..5 %e A216342 ..4..x..5..x....6..x..7..x....4..x..5..x....0..x..2..x....5..x..0..x %e A216342 ..x..0..x..5....x..2..x..1....x..0..x..6....x..4..x..3....x..2..x..1 %K A216342 nonn %O A216342 1,1 %A A216342 _R. H. Hardin_ Sep 04 2012