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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 54 |
| 2 | 2286 |
| 3 | 122190 |
| 4 | 8724078 |
| 5 | 823457454 |
| 6 | 100404000846 |
| 7 | 15445311861390 |
| 8 | 2934753347117358 |
| 9 | 676223959655421294 |
| 10 | 185986910414695643406 |
| 11 | 60231705473327959533390 |
| 12 | 22698043087316618235027438 |
| 13 | 9851411569806951176305061934 |
| 14 | 4880091238653863086970659298766 |
| 15 | 2737198931321130792428426472626190 |
[1,54,2286,122190,8724078,823457454,100404000846, 15445311861390,2934753347117358, 676223959655421294,185986910414695643406, 60231705473327959533390, 22698043087316618235027438, 9851411569806951176305061934, 4880091238653863086970659298766, 2737198931321130792428426472626190] |