A141740 Cumulative sum of the rows of triangle A141728.
1, 1, 4, 6, 10, 13, 19, 28, 35, 42, 51, 59, 70, 78, 91, 107, 125, 139, 153, 167, 189, 209, 229, 254, 276
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.