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 A221839 #15 Apr 12 2025 18:23:03 %S A221839 1,1,2,4,10,22,57,157,447 %N A221839 Number of rectangles dissectible into a minimum of n squares. %F A221839 a(n) is the number of rectangles pXq for which GCD(p,q) = 1 and T(p,q) = n in A219158. %e A221839 For n = 4 the a(4) = 4 rectangles are 4X1, 4X3, 5X2 and 5X3. %Y A221839 Cf. A210517. %K A221839 nonn,more %O A221839 1,3 %A A221839 _Geoffrey H. Morley_, Jan 26 2013