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 | 5 |
| 1 | 21 |
| 2 | 55 |
| 3 | 115 |
| 4 | 210 |
| 5 | 350 |
| 6 | 546 |
| 7 | 810 |
| 8 | 1155 |
| 9 | 1595 |
| 10 | 2145 |
| 11 | 2821 |
| 12 | 3640 |
| 13 | 4620 |
| 14 | 5780 |
| 15 | 7140 |
| 16 | 8721 |
| 17 | 10545 |
| 18 | 12635 |
| 19 | 15015 |
| 20 | 17710 |
| 21 | 20746 |
| 22 | 24150 |
| 23 | 27950 |
| 24 | 32175 |
| 25 | 36855 |
| 26 | 42021 |
| 27 | 47705 |
| 28 | 53940 |
| 29 | 60760 |
| 30 | 68200 |
| 31 | 76296 |
| 32 | 85085 |
| 33 | 94605 |
| 34 | 104895 |
| 35 | 115995 |
| 36 | 127946 |
| 37 | 140790 |
| 38 | 154570 |
| 39 | 169330 |
| 40 | 185115 |