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 | 29 |
| 3 | 49 |
| 4 | 69 |
| 5 | 89 |
| 6 | 219 |
| 7 | 239 |
| 8 | 259 |
| 9 | 279 |
| 10 | 419 |
| 11 | 439 |
| 12 | 459 |
| 13 | 479 |
| 14 | 619 |
| 15 | 639 |
| 16 | 659 |
| 17 | 679 |
| 18 | 819 |
| 19 | 839 |
| 20 | 859 |
| 21 | 879 |
| 22 | 2110 |
| 23 | 2130 |
| 24 | 2150 |
| 25 | 2170 |
| 26 | 2190 |
| 27 | 2310 |
| 28 | 2330 |
| 29 | 2350 |
| 30 | 2370 |
| 31 | 2390 |
| 32 | 2510 |
| 33 | 2530 |
| 34 | 2550 |
| 35 | 2570 |
| 36 | 2590 |
| 37 | 2710 |
| 38 | 2730 |
| 39 | 2750 |
| 40 | 2770 |
| 41 | 2790 |
| 42 | 2910 |
| 43 | 2930 |
| 44 | 2950 |
| 45 | 2970 |
| 46 | 2990 |
| 47 | 4110 |
| 48 | 4130 |