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) |
|---|---|
| 3 | 5 |
| 4 | 24 |
| 5 | 79 |
| 6 | 223 |
| 7 | 579 |
| 8 | 1432 |
| 9 | 3434 |
| 10 | 8071 |
| 11 | 18714 |
| 12 | 42991 |
| 13 | 98127 |
| 14 | 222965 |
| 15 | 505008 |
| 16 | 1141236 |
| 17 | 2574845 |
| 18 | 5802636 |
| 19 | 13065935 |
| 20 | 29403439 |
| 21 | 66141015 |
| 22 | 148734156 |
| 23 | 334391354 |
| 24 | 751675943 |
| 25 | 1689494650 |
| 26 | 3797059555 |
| 27 | 8533209055 |
| 28 | 19176039925 |
| 29 | 43091557504 |
| 30 | 96831330948 |
| 31 | 217586892705 |