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 A200269 #6 Jul 22 2025 15:46:02 %S A200269 1,6,10,14,18,26,34,52,34,104,172,392,186,546,226,766,806,2474,1202, %T A200269 4214,442,2328 %N A200269 Number of 0..5 arrays x(0..n+1) of n+2 elements with zero n-1st differences. %C A200269 Column 5 of A200272 %e A200269 Some solutions for n=6 %e A200269 ..3....2....2....0....2....4....2....3....3....5....1....5....0....4....0....1 %e A200269 ..5....0....3....5....1....3....4....2....3....5....1....0....0....5....4....2 %e A200269 ..3....2....2....5....2....4....2....3....3....5....1....0....0....4....5....1 %e A200269 ..1....4....1....4....3....5....0....4....3....5....1....2....1....3....5....0 %e A200269 ..1....4....1....4....3....5....0....4....3....5....1....4....3....3....5....0 %e A200269 ..3....2....2....5....2....4....2....3....3....5....1....5....5....4....5....1 %e A200269 ..5....0....3....5....1....3....4....2....3....5....1....5....5....5....4....2 %e A200269 ..3....2....2....0....2....4....2....3....3....5....1....5....0....4....0....1 %K A200269 nonn %O A200269 1,2 %A A200269 _R. H. Hardin_ Nov 15 2011