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) |
|---|---|
| 1 | 7 |
| 2 | 49 |
| 3 | 240 |
| 4 | 876 |
| 5 | 2582 |
| 6 | 6504 |
| 7 | 14547 |
| 8 | 29659 |
| 9 | 56161 |
| 10 | 100123 |
| 11 | 169786 |
| 12 | 276030 |
| 13 | 432888 |
| 14 | 658106 |
| 15 | 973749 |
| 16 | 1406853 |
| 17 | 1990123 |
| 18 | 2762677 |
| 19 | 3770836 |
| 20 | 5068960 |
| 21 | 6720330 |
| 22 | 8798076 |
| 23 | 11386151 |
| 24 | 14580351 |
| 25 | 18489381 |
| 26 | 23235967 |
| 27 | 28958014 |
| 28 | 35809810 |
| 29 | 43963276 |
| 30 | 53609262 |