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 A189353 #7 Jul 22 2025 11:43:58 %S A189353 0,2005,229248,94635005,24728774144,7675175968337,2239546267804672, %T A189353 669245368116765065,198265824869143635104,58936758437348449273685, %U A189353 17497862834694963378124992,5197536868658118835508778253 %N A189353 Number of nX7 array permutations with each element moving one space diagonally, horizontally or vertically. %C A189353 Column 7 of A189355 %H A189353 R. H. Hardin, <a href="/A189353/b189353.txt">Table of n, a(n) for n = 1..90</a> %e A189353 Some solutions for 3X7 %e A189353 ..1..2..3..4.11..6.13....1..2..3.10..5..4.13....1..0.10..2.11.12..5 %e A189353 ..0..7.16..9.10.20..5...14..0..8.17.18.11..6...14..7.17.18..3..4..6 %e A189353 .15.14..8.18.17.12.19...15..7..9.16.19.20.12...15.16..8..9.19.20.13 %K A189353 nonn %O A189353 1,2 %A A189353 _R. H. Hardin_ Apr 20 2011