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 A143790 #7 Oct 31 2019 01:44:00 %S A143790 1,3,1,4,6,1,7,41,19,1,11,281,341,46,1,18,1926,6119,2161,124,1,29, %T A143790 13201,109801,101521,15251,321,1,47,90481,1970299,4769326,1875749, %U A143790 103361,844,1,76,620166,35355581,224056801,230701876,33281921,711491,2206,1,123 %N A143790 Integer Quotients of Lucas Numbers; a rectangular array by downward antidiagonals. %C A143790 Every integer-valued quotient of Lucas numbers (excluding L(0)=2) is in this array. %C A143790 (Row 1) = A000032 except for a(0) %C A143790 (Row 2) = A049685 %C A143790 (Row 3) = A049629 %C A143790 (Column 2) = A110391 except for initial terms %F A143790 Row 1: L(k)/L(1), where L(k)=A000032(k) = k-th Lucas number, for k>=1; %F A143790 Row n: L(2nk-n)/L(n) for n>=2, k>=1. %e A143790 Q(3,2)=L(9)/L(3)=76/4=19. %Y A143790 Cf. A000032. %K A143790 nonn,tabl %O A143790 1,2 %A A143790 _Clark Kimberling_, Sep 01 2008