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 A195807 #6 Jul 22 2025 12:47:20 %S A195807 64,1695,24928,213319,1274808,5828215,21779968 %N A195807 Number of triangular of a 6X6X6 0..n arrays with all rows and diagonals having the same length having the same sum, with corners zero. %C A195807 Row 6 of A195805 %e A195807 Some solutions for n=3 %e A195807 .......0............0............0............0............0............0 %e A195807 ......1.2..........0.1..........3.3..........1.2..........0.1..........0.3 %e A195807 .....3.1.2........0.2.0........0.3.1........3.1.2........0.2.0........2.2.2 %e A195807 ....3.1.0.3......1.1.1.0......3.0.0.2......3.1.0.3......1.1.1.0......2.3.3.2 %e A195807 ...1.0.2.2.1....1.0.1.1.1....3.0.3.0.3....1.0.2.2.1....1.0.1.1.1....3.2.3.2.0 %e A195807 ..0.2.3.1.2.0..0.0.1.1.0.0..0.3.1.2.3.0..0.2.3.1.2.0..0.0.1.1.0.0..0.0.2.2.3.0 %K A195807 nonn %O A195807 1,1 %A A195807 _R. H. Hardin_ Sep 23 2011