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.
| n | a(n) |
|---|---|
| 1 | 696 |
| 2 | 9712 |
| 3 | 137888 |
| 4 | 1995752 |
| 5 | 28927984 |
| 6 | 420545824 |
| 7 | 6111765608 |
| 8 | 88883321584 |
| 9 | 1292321119496 |
| 10 | 18793764804064 |
| 11 | 273281958853584 |
| 12 | 3974120752445352 |
| 13 | 57789976679148952 |
| 14 | 840380963807821656 |
| 15 | 12220602110589974744 |