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) |
|---|---|
| 74 | 1 |
| 75 | 75 |
| 76 | 2850 |
| 77 | 73150 |
| 78 | 1426425 |
| 79 | 22537515 |
| 80 | 300500200 |
| 81 | 3477216600 |
| 82 | 35641470150 |
| 83 | 328693558050 |
| 84 | 2761025887620 |
| 85 | 21335200040700 |
| 86 | 152902266958350 |
| 87 | 1023269017336650 |
| 88 | 6431976680401800 |
| 89 | 38163061637050680 |