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| n | a(n) |
|---|---|
| 1 | 450 |
| 2 | 3111 |
| 3 | 22631 |
| 4 | 103572 |
| 5 | 521009 |
| 6 | 1977416 |
| 7 | 8184420 |
| 8 | 28090376 |
| 9 | 103642465 |
| 10 | 335513910 |
| 11 | 1152080497 |
| 12 | 3601128859 |
| 13 | 11804897109 |
| 14 | 36133666589 |
| 15 | 114900581827 |
| 16 | 347429189096 |
| 17 | 1082835562563 |
| 18 | 3252204907458 |
| 19 | 10002963846786 |
| 20 | 29941713758994 |
[450,3111,22631,103572,521009,1977416,8184420, 28090376,103642465,335513910,1152080497, 3601128859,11804897109,36133666589,114900581827, 347429189096,1082835562563,3252204907458, 10002963846786,29941713758994] |