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 A200276 #7 Jul 22 2025 15:46:29 %S A200276 2,5,8,21,34,53,118,267,516,901,1454,2249,3264,5135,7616,11061,15434, %T A200276 21089,28008,36687,49294,65037,84056,107327,134670,167275,204986, %U A200276 256111,315260,385087,464742,557425,661956,781471,930978,1102693,1294980 %N A200276 Number of 0..n arrays x(0..8) of 9 elements with zero 6th differences. %C A200276 Row 7 of A200272 %H A200276 R. H. Hardin, <a href="/A200276/b200276.txt">Table of n, a(n) for n = 1..52</a> %e A200276 Some solutions for n=6 %e A200276 ..5....4....2....0....3....6....1....2....4....6....2....4....3....3....2....3 %e A200276 ..1....0....6....4....3....2....5....2....4....2....6....4....3....3....6....3 %e A200276 ..1....2....5....1....6....4....4....2....4....3....3....5....0....3....6....2 %e A200276 ..2....3....4....0....6....5....3....2....4....4....2....5....0....3....5....2 %e A200276 ..3....2....4....2....3....4....3....2....4....4....4....4....3....3....4....3 %e A200276 ..4....1....4....4....0....3....3....2....4....4....6....3....6....3....3....4 %e A200276 ..5....2....3....3....0....4....2....2....4....5....5....3....6....3....2....4 %e A200276 ..5....4....2....0....3....6....1....2....4....6....2....4....3....3....2....3 %e A200276 ..1....0....6....4....3....2....5....2....4....2....6....4....3....3....6....3 %K A200276 nonn %O A200276 1,1 %A A200276 _R. H. Hardin_ Nov 15 2011