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 A278256 #6 Nov 22 2016 21:50:21 %S A278256 2,6,12,12,30,30,24,72,60,30,60,60,30,210,240,48,60,60,60,420,210,30, %T A278256 120,360,60,120,360,60,210,210,96,480,210,210,1260,180,30,210,840,120, %U A278256 210,210,60,1260,420,30,240,720,180,420,420,60,120,840,840,840,210,30,420,420,30,420,2880,960,2310,210,60,420,2310,210,360,360,30,420,1260,420,2310 %N A278256 Least number with the same prime signature as the n-th oblong number (A002378). %H A278256 Antti Karttunen, <a href="/A278256/b278256.txt">Table of n, a(n) for n = 1..10000</a> %F A278256 a(n) = A046523(A002378(n)). %F A278256 a(n) = A278259((2*n) + 1). %o A278256 (Scheme) (define (A278256 n) (A046523 (A002378 n))) %Y A278256 Odd bisection of A278259. %Y A278256 Cf. A002378, A046523. %Y A278256 Cf. also A278253. %K A278256 nonn %O A278256 1,1 %A A278256 _Antti Karttunen_, Nov 22 2016