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 | 6 |
| 2 | 32 |
| 3 | 163 |
| 4 | 813 |
| 5 | 4013 |
| 6 | 19703 |
| 7 | 96477 |
| 8 | 471811 |
| 9 | 2306316 |
| 10 | 11274066 |
| 11 | 55128021 |
| 12 | 269688723 |
| 13 | 1320047550 |
| 14 | 6465047880 |
| 15 | 31682288305 |
| 16 | 155354522955 |
| 17 | 762235643450 |
| 18 | 3742013092520 |
| 19 | 18380748447345 |
| 20 | 90334417334095 |
| 21 | 444186621323945 |
| 22 | 2185193308168959 |
| 23 | 10755153057295603 |
| 24 | 52958560495897573 |