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 | 7 |
| 3 | 19 |
| 4 | 47 |
| 5 | 76 |
| 6 | 145 |
| 7 | 183 |
| 8 | 319 |
| 9 | 433 |
| 10 | 762 |
| 11 | 1068 |
| 12 | 1625 |
| 13 | 1457 |
| 14 | 511 |
| 15 | -2696 |
| 16 | -7617 |
| 17 | -12494 |
| 18 | -8999 |
| 19 | 14802 |
| 20 | 78682 |
| 21 | 195984 |
| 22 | 363458 |
| 23 | 530289 |
| 24 | 574297 |
| 25 | 252976 |
| 26 | -820475 |
| 27 | -3259007 |
| 28 | -7929105 |
| 29 | -15918795 |
| 30 | -27966750 |
| 31 | -42783874 |
| 32 | -52969921 |
| 33 | -37772397 |
| 34 | 47098898 |
| 35 | 278012363 |
| 36 | 759015293 |
| 37 | 1583148046 |
| 38 | 2729030066 |
| 39 | 3860814119 |
| 40 | 4015793914 |
| 41 | 1214574612 |
| 42 | -7871995868 |
| 43 | -27884564061 |
| 44 | -63760120938 |
| 45 | -117678872282 |
| 46 | -182313402679 |
| 47 | -228194585696 |
| 48 | -183355932567 |
| 49 | 93528356566 |
| 50 | 836233409412 |
| 51 | 2360489258476 |
| 52 | 4956621402741 |
| 53 | 8577450776595 |
| 54 | 12176709992155 |
| 55 | 12572248705543 |
| 56 | 2874527812671 |
| 57 | -29026344726969 |
| 58 | -100513507605919 |
| 59 | -229939345736773 |
| 60 | -423043591887710 |
| 61 | -643162163240861 |
| 62 | -757839109104688 |
| 63 | -458886747576888 |
| 64 | 831588355306815 |
| 65 | 4020413344163097 |
| 66 | 10249469548463477 |
| 67 | 20417504944664974 |
| 68 | 33937902760293134 |
| 69 | 46224437161712292 |
| 70 | 44445354551818961 |
| 71 | 1635692222011481 |
| 72 | -129140996172417587 |