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 A108397 #6 Mar 31 2015 20:20:44 %S A108397 0,2,10,66,692,9780,167982,3362828,76695880,1961316270,55555555610, %T A108397 1726135607262,58359930206844,2132745542253872,83767436069591302, %U A108397 3518790190560477240,157412216095654840592,7471013615160978901626 %N A108397 Sums of rows of the triangle in A108396. %H A108397 Reinhard Zumkeller, <a href="/A108397/b108397.txt">Table of n, a(n) for n = 0..250</a> %F A108397 a(n) = n*(n^(n+1) + n^2 - 2) / (2*(n-1)) for n>1. %o A108397 (Haskell) %o A108397 a108397 0 = 0 %o A108397 a108397 1 = 2 %o A108397 a108397 n = n * (n^(n+1) + n^2 - 2) `div` (2 * (n-1)) %o A108397 -- _Reinhard Zumkeller_, Mar 31 2015 %Y A108397 Cf. A007778, A062970. %K A108397 nonn %O A108397 0,2 %A A108397 _Reinhard Zumkeller_, Jun 02 2005