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 A046200 #13 Jul 02 2025 16:01:56 %S A046200 1,3,3,5,5,7,105,105,7,9,9,11,495,495,11,13,6435,6435,13,15,1365, %T A046200 15015,45045,45045,15015,1365,15,17,17,19,2907,2907,19,21,101745, %U A046200 101745,21,23,5313,168245,1716099,1716099,168245,5313,23,25,18386775,18386775,25 %N A046200 Odd numbers in the triangle of denominators in Leibniz's Harmonic Triangle. %D A046200 L. Comtet, Advanced Combinatorics, Reidel, 1974, p. 83, Problem 25. %e A046200 1/1; --> 1 %e A046200 1/2, 1/2; --> %e A046200 1/3, 1/6, 1/3; --> 3 3 %e A046200 1/4, 1/12, 1/12, 1/4; --> ... %e A046200 1/5, 1/20, 1/30, 1/20, 1/5; ... %Y A046200 Cf. A003506. %K A046200 tabf,nonn,easy,less %O A046200 1,2 %A A046200 _Mohammad K. Azarian_ %E A046200 More terms from _James Sellers_, Dec 13 1999