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 A216029 #5 Jul 22 2025 23:29:21 %S A216029 2,42,1534,167130,30312074,10311562327,4761748786964,3439948243132701 %N A216029 Number of horizontal, vertical and diagonal neighbor colorings of the odd squares of an nX6 array with new integer colors introduced in row major order. %C A216029 Column 6 of A216031 %e A216029 Some solutions for n=4 %e A216029 ..x..0..x..1..x..2....x..0..x..1..x..0....x..0..x..1..x..2....x..0..x..1..x..2 %e A216029 ..0..x..3..x..4..x....2..x..3..x..4..x....1..x..2..x..3..x....1..x..3..x..0..x %e A216029 ..x..3..x..5..x..0....x..3..x..5..x..6....x..4..x..0..x..5....x..4..x..0..x..4 %e A216029 ..5..x..0..x..2..x....3..x..4..x..7..x....5..x..1..x..5..x....2..x..5..x..4..x %K A216029 nonn %O A216029 1,1 %A A216029 _R. H. Hardin_ Aug 30 2012