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) |
|---|---|
| 6 | 1 |
| 7 | 22 |
| 8 | 295 |
| 9 | 3145 |
| 10 | 29503 |
| 11 | 256565 |
| 12 | 2144517 |
| 13 | 17743090 |
| 14 | 148599335 |
| 15 | 1276302900 |
| 16 | 11282648837 |
| 17 | 102385155537 |
| 18 | 949462521827 |
| 19 | 8967298797097 |
| 20 | 86161326118467 |
| 21 | 843025151446964 |
| 22 | 8418457337349711 |
| 23 | 86033922399717781 |
| 24 | 902026616406147607 |
| 25 | 9718711403938257151 |