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 A046207 #10 Jul 02 2025 16:01:56 %S A046207 2,3,12,4,20,5,60,30,6,105,42,7,280,168,56,8,504,252,72,9,1260,840, %T A046207 360,90,10,2310,1320,495,110,11,5544,3960,1980,660,132,12,10296,6435, %U A046207 2860,858,156,13,24024,18018,10010,4004,1092,182,14,45045,30030,15015,5460 %N A046207 Numbers to the right of the central elements in the triangle of denominators in Leibniz's Harmonic Triangle. %D A046207 L. Comtet, Advanced Combinatorics, Reidel, 1974, p. 83, Problem 25. %Y A046207 Cf. A003506. %K A046207 tabf,nonn,easy %O A046207 1,1 %A A046207 _Mohammad K. Azarian_ %E A046207 More terms from _James Sellers_, Dec 13 1999