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 A077560 #13 Dec 29 2020 02:52:59 %S A077560 3,9,10,27,18,81,40,42,243,100,80,84,729,108,160,168,2187,324,252,320, %T A077560 330,1000,336,6561,800,504,640,630,648,672,19683,1600,1008,1280,1320, %U A077560 1944,1764,1344,59049,1512,3200,1980,10000,2016,2560,2640,5832,2700 %N A077560 Second smallest integer of prime signature corresponding to that of A025487. %C A077560 In A025487 the terms are in increasing order but here there are ups and downs. %H A077560 Amiram Eldar, <a href="/A077560/b077560.txt">Table of n, a(n) for n = 2..10001</a> %F A077560 a(n) = A081761(A025487(n)). - _Amiram Eldar_, Dec 29 2020 %Y A077560 Cf. A025487, A081761. %K A077560 nonn %O A077560 2,1 %A A077560 _Amarnath Murthy_, Nov 10 2002 %E A077560 Corrected and extended by _Ray Chandler_, Aug 24 2003