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 A209659 #12 Mar 30 2012 17:34:09 %S A209659 1,5,11,30,56,77,135,176,231,385,490,627,792,1575,1958,3010,6842,8349, %T A209659 17977,26015,75175,89134,124754,147273,281589,386155,451276,526823, %U A209659 614154,831820,966467,2012558,3087735,5392783,8118264,9289091,13848650 %N A209659 Partition numbers p(n) having opposite parity of n. %C A209659 Union of A154797 and A154796. The union of this sequence and A209658 gives A000041. %H A209659 K. Ono, <a href="http://www.ams.org/era/1995-01-01/S1079-6762-95-01005-5/S1079-6762-95-01005-5.pdf">Parity of the partition function</a>, Electronic Research Announcements of AMS, Vol. 1, 1995, pp. 35-42; MR 96d:11108 %Y A209659 Cf. A000041, A052001, A052003, A067567, A127219, A154795-A154798, A163096, A163097, A194798, A209658, A209920. %K A209659 nonn %O A209659 1,2 %A A209659 _Omar E. Pol_, Mar 22 2012