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 A211007 #5 Oct 20 2012 11:03:55 %S A211007 1,6,10,15,21,28,55,66,78,91,136,153,171,190,253,276,406,435,465,496, %T A211007 666,703,820,861,903,946,1081,1128,1378,1431,1711,1770,1830,1891,2211, %U A211007 2278,2485,2556,2628,2701,3081,3160,3403,3486,3916,4005,4656,4753,5050 %N A211007 Surface area of the first n faces of the structure mentioned in A211006. %C A211007 All members of this sequence are triangular numbers A000217. %C A211007 It appears that this is the same as A147846 without 3. %Y A211007 Partial sums of A211006. %Y A211007 Cf. A000040, A018252, A000217, A147876, A211005. %K A211007 nonn %O A211007 1,2 %A A211007 _Omar E. Pol_, Aug 12 2012