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 A189810 #7 Jul 22 2025 11:54:54 %S A189810 68,238,524,926,1444,2060,2784,3596,4492,5470,6516,7630,8820,10070, %T A189810 11380,12758,14204,15710,17276,18902,20596,22350,24164,26038,27972, %U A189810 29970,32028,34146,36324,38562,40860,43218,45636,48114,50652,53250,55908,58626,61404 %N A189810 Number of right triangles on a (n+1)X6 grid. %C A189810 Column 5 of A189814 %H A189810 R. H. Hardin, <a href="/A189810/b189810.txt">Table of n, a(n) for n = 1..200</a> %F A189810 Empirical: a(n) = 30*n^2 + 468*n - 2478 for n>24 %e A189810 Some solutions for n=3 %e A189810 ..3..5....0..3....3..4....0..0....2..5....3..1....3..3....1..2....3..2....1..2 %e A189810 ..0..5....0..2....1..4....0..3....1..5....0..1....0..3....1..3....0..0....1..5 %e A189810 ..3..0....1..3....3..0....3..0....2..2....3..4....3..1....2..2....1..5....2..2 %K A189810 nonn %O A189810 1,1 %A A189810 _R. H. Hardin_ Apr 28 2011