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 A031128 #7 May 01 2017 13:28:15 %S A031128 6,18,46,96,188,338,588,974,1575,2471,3803,5726,8497,12399,17873, %T A031128 25432,35817,49907,68938,94377,128233,172916,231629,308239,407803, %U A031128 536411,701909,913772,1184021,1527164,1961431,2508761,3196472 %N A031128 Number of proper factorizations of p1^n*p2^5, where p1 and p2 are distinct primes. %F A031128 a(n) = A000491(n) - 1 = A028422(2^n*3^5). - _Ray Chandler_, May 01 2017 %Y A031128 Cf. A000491, A028422. %K A031128 nonn %O A031128 0,1 %A A031128 _Jeff Burch_ %E A031128 Offset changed to 0, a(13)=12399 corrected and more terms added by _Ray Chandler_, May 01 2017