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 | 3 |
| 2 | 6 |
| 3 | 10 |
| 4 | 15 |
| 5 | 22 |
| 6 | 31 |
| 7 | 44 |
| 8 | 62 |
| 9 | 87 |
| 10 | 122 |
| 11 | 171 |
| 12 | 240 |
| 13 | 336 |
| 14 | 471 |
| 15 | 660 |
| 16 | 925 |
| 17 | 1296 |
| 18 | 1816 |
| 19 | 2545 |
| 20 | 3566 |
| 21 | 4997 |
| 22 | 7002 |
| 23 | 9812 |
| 24 | 13749 |
| 25 | 19266 |
| 26 | 26997 |
| 27 | 37830 |
| 28 | 53010 |
| 29 | 74281 |
| 30 | 104088 |
| 31 | 145855 |
| 32 | 204382 |
| 33 | 286394 |
| 34 | 401315 |
| 35 | 562350 |
| 36 | 788003 |
| 37 | 1104204 |
| 38 | 1547286 |
| 39 | 2168163 |
| 40 | 3038178 |
| 41 | 4257303 |
| 42 | 5965624 |
| 43 | 8359440 |
| 44 | 11713819 |
| 45 | 16414204 |
| 46 | 23000705 |
| 47 | 32230160 |