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 | 0 |
| 2 | 1 |
| 3 | 2 |
| 4 | 3 |
| 5 | 4 |
| 6 | 5 |
| 7 | 7 |
| 8 | 154 |
| 9 | 178 |
| 10 | 203 |
| 11 | 5001 |
| 12 | 7409 |
| 13 | 315721 |
| 14 | 567434 |
| 15 | 1032507 |
| 16 | 46823602 |
| 17 | 56939099 |
| 18 | 84572293 |
| 19 | 119204743 |
| 20 | 1420737297 |
| 21 | 1830945641 |
| 22 | 2115191225 |
| 23 | 3286138051 |
| 24 | 3292861699 |
| 25 | 4061216947 |
| 26 | 8094406311 |
| 27 | 43253138565 |
| 28 | 80375377033 |
| 29 | 88574916241 |
| 30 | 108218625313 |
| 31 | 116606986537 |
| 32 | 116755331881 |
| 33 | 166787896538 |
| 34 | 186431605610 |
| 35 | 318743407660 |
| 36 | 396619220597 |
| 37 | 1756866976011 |
| 38 | 4920262093249 |
| 39 | 11760498311914 |
| 40 | 15804478291811 |
| 41 | 15813860880803 |
| 42 | 24722285628901 |
| 43 | 33004205249575 |
| 44 | 55584258482529 |
| 45 | 371039856325905 |
| 46 | 401205063672537 |
| 47 | 516268720555889 |