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 A031127 #10 May 01 2017 15:11:28 %S A031127 4,11,28,56,108,188,322,521,830,1278,1940,2875,4214,6065,8643,12150, %T A031127 16932,23335,31920,43263,58249,77824,103361,136370,178974,233531, %U A031127 303267,391830,504068,645519,823418,1046066,1324135,1669949,2099103 %N A031127 Number of proper factorizations of p1^n*p2^4, where p1 and p2 are distinct primes. %H A031127 Ray Chandler, <a href="/A031127/b031127.txt">Table of n, a(n) for n = 0..100</a> %F A031127 a(n) = A000465(n) - 1 = A028422(2^n*3^4). - _Ray Chandler_, May 01 2017 %Y A031127 Cf. A000465, A028422. %K A031127 nonn %O A031127 0,1 %A A031127 _Jeff Burch_ %E A031127 Offset changed to 0 and more terms added by _Ray Chandler_, May 01 2017