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 | 1 |
| 1 | 10 |
| 2 | 471 |
| 3 | 27076 |
| 4 | 1713955 |
| 5 | 114751470 |
| 6 | 7969151855 |
| 7 | 567878871304 |
| 8 | 41247976697019 |
| 9 | 3040572724077010 |
| 10 | 226777538499783271 |
| 11 | 17076122335343354700 |
| 12 | 1296037531424347164115 |
| 13 | 99025149551454886937590 |
| 14 | 7609414766853344476768095 |
| 15 | 587623058661705739915402256 |