A174052 The sum of the numbers in n-th row of alternant triangle A173865.
1, 40, 81, 296, 449, 984, 1301, 2320, 2913, 4558, 5441
Offset: 1
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.