A054099 Sum{T(n,k): k=0,1,...,n}, array T as in A054098.
1, 3, 6, 14, 44, 178, 892, 5354, 37480, 299842, 2698580, 26985802, 296843824, 3562125890, 46307636572, 648306912010, 9724603680152, 155593658882434, 2645092201001380
Offset: 0
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.