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 A141900 #5 Mar 30 2012 17:21:02 %S A141900 1,2,12,24,240,480,6720,13440,241920,483840,10644480,21288960, %T A141900 553512960,1107025920,2214051840,4428103680,150555525120,301111050240, %U A141900 11442219909120,22884439818240,45768879636480 %N A141900 a(n) = smallest term in A141586 that is divisible by 2^n but not by 2^(n+1). %H A141900 N. J. A. Sloane, <a href="/A141900/b141900.txt">Table of n, a(n) for n = 0..50</a> [Computed using David Applegate's program from A142593] %e A141900 a(5) = 480 = 2^5*3*5. %Y A141900 Cf. A141586, A142593 (factorizations). %K A141900 nonn %O A141900 0,2 %A A141900 _David Applegate_, Tim Kunisky (tkunisky(AT)gmail.com), Gerry Manoim (gerrymanoim(AT)gmail.com) and _N. J. A. Sloane_, Sep 18 2008