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 | 1 |
| 2 | 3 |
| 3 | 5 |
| 4 | 15 |
| 5 | 183 |
| 6 | 355 |
| 7 | 505 |
| 8 | 915 |
| 9 | 1065 |
| 10 | 1515 |
| 11 | 12165 |
| 12 | 35855 |
| 13 | 64965 |
| 14 | 92415 |
| 15 | 107565 |
| 16 | 134139 |
| 17 | 201995 |
| 18 | 605985 |
| 19 | 670695 |
| 20 | 742065 |
| 21 | 863715 |
| 22 | 1228665 |
| 23 | 1674633 |
| 24 | 1675365 |
| 25 | 2269515 |
| 26 | 6561465 |
| 27 | 8373165 |
| 28 | 9074865 |
| 29 | 13772865 |
| 30 | 16521423 |
| 31 | 20401495 |
| 32 | 24197155 |
| 33 | 25709455 |
| 34 | 29234715 |
| 35 | 36965085 |
| 36 | 47619345 |
| 37 | 52686615 |
| 38 | 61204485 |
| 39 | 67740195 |
| 40 | 70694445 |
| 41 | 72591465 |