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 | 0 |
| 1 | 1 |
| 2 | 11 |
| 3 | 56 |
| 4 | 196 |
| 5 | 546 |
| 6 | 1302 |
| 7 | 2772 |
| 8 | 5412 |
| 9 | 9867 |
| 10 | 17017 |
| 11 | 28028 |
| 12 | 44408 |
| 13 | 68068 |
| 14 | 101388 |
| 15 | 147288 |
| 16 | 209304 |
| 17 | 291669 |
| 18 | 399399 |
| 19 | 538384 |
| 20 | 715484 |
| 21 | 938630 |
| 22 | 1216930 |
| 23 | 1560780 |
| 24 | 1981980 |
| 25 | 2493855 |
| 26 | 3111381 |
| 27 | 3851316 |
| 28 | 4732336 |
| 29 | 5775176 |
| 30 | 7002776 |
| 31 | 8440432 |