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 A104879 #10 Dec 19 2020 21:26:50
%S A104879 1,2,4,8,17,40,106,316,1049,3830,15208,65072,297841,1449756,7468542,
%T A104879 40555748,231335961,1381989882,8623700812,56078446616,379233142801,
%U A104879 2662013133296,19362917622002,145719550012300,1133023004941273,9090156910550110,75161929739797520
%N A104879 Row sums of a sum-of-powers triangle.
%F A104879 a(n) = 1 + n + Sum_{k=2..n+1} (k^(n-k+1)-1)/(k-1).
%F A104879 a(n) = 1 + A103439(n). - _Mathew Englander_, Dec 19 2020
%Y A104879 Row sums of A104878.
%Y A104879 Cf. A103439 (terms differ by 1), A026898 (first differences).
%K A104879 easy,nonn
%O A104879 0,2
%A A104879 _Paul Barry_, Mar 28 2005