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) |
|---|---|
| 0 | 0 |
| 1 | 15 |
| 2 | 239 |
| 3 | 2877 |
| 4 | 31985 |
| 5 | 343614 |
| 6 | 3626619 |
| 7 | 37861249 |
| 8 | 392351272 |
| 9 | 4044220058 |
| 10 | 41518796555 |
| 11 | 424904645958 |
| 12 | 4337589196099 |
| 13 | 44189168275565 |
| 14 | 449411845856902 |
| 15 | 4564053529871328 |
| 16 | 46294122513328879 |
| 17 | 469075734968975581 |
| 18 | 4748553675150670580 |
| 19 | 47797839092868715542 |