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 A200328 #6 Jul 22 2025 15:46:57 %S A200328 1,8,14,20,28,26,18,16,30,34,44,42,16,44,54,98,168,248,76,54,30,12,18, %T A200328 28 %N A200328 Number of 0..7 arrays x(0..n+2) of n+3 elements with zero n-1st differences. %C A200328 Column 7 of A200329 %e A200328 Some solutions for n=6 %e A200328 ..7....1....5....5....3....0....0....2....0....7....1....1....2....2....0....6 %e A200328 ..5....1....5....0....3....2....7....0....6....1....5....0....6....7....2....7 %e A200328 ..5....1....5....0....3....2....7....2....7....0....6....1....7....7....5....6 %e A200328 ..5....1....5....2....3....2....5....5....6....1....5....2....6....5....7....5 %e A200328 ..4....1....5....4....3....3....4....7....5....2....3....2....4....3....7....5 %e A200328 ..2....1....5....5....3....5....5....7....5....2....1....1....2....2....5....6 %e A200328 ..0....1....5....5....3....7....7....5....6....1....0....0....1....2....2....7 %e A200328 ..0....1....5....5....3....7....7....2....7....0....1....1....2....2....0....6 %e A200328 ..5....1....5....7....3....2....0....0....6....1....5....7....6....0....2....0 %K A200328 nonn %O A200328 1,2 %A A200328 _R. H. Hardin_ Nov 16 2011