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 | 10 |
| 2 | 33 |
| 3 | 213 |
| 4 | 1538 |
| 5 | 11872 |
| 6 | 95428 |
| 7 | 806095 |
| 8 | 6954793 |
| 9 | 61574510 |
| 10 | 553007106 |
| 11 | 5024332415 |
| 12 | 45975917532 |
| 13 | 422675487735 |
| 14 | 3902487368735 |
| 15 | 36116199480944 |
| 16 | 335270244411437 |
| 17 | 3128167760734131 |
| 18 | 29410615796612778 |
| 19 | 278977554117741592 |
| 20 | 2664295247105153610 |
| 21 | 25539536718894979516 |