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 A075645 #4 Dec 05 2013 19:55:39 %S A075645 2,9,16,55,78,112,232,342,420,605,852,1053,1330,1650,2144,2601,3168, %T A075645 3534,4420,5229,5984,6670,7440,8950,10478,11232,12712,13775,15510, %U A075645 17236,19200,20526,22780,26040,27756,29896,32452,35958,39120,41533,45570 %N A075645 Sums of groups in A075643. %C A075645 a(n) is a multiple of (n+1). %Y A075645 Cf. A075643, A075644, A075646, A075647. %K A075645 nonn %O A075645 1,1 %A A075645 _Amarnath Murthy_, Sep 30 2002 %E A075645 More terms from _David Wasserman_, Jan 22 2005