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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 8 |
| 3 | 261 |
| 4 | 18400 |
| 5 | 2383800 |
| 6 | 523322208 |
| 7 | 179218487938 |
| 8 | 89683747547520 |
| 9 | 62708998782383118 |
| 10 | 59089857758999295000 |
| 11 | 72802718522742159383487 |
| 12 | 114483047893936622981751744 |
| 13 | 225239782463528942954480067562 |
| 14 | 545115039824232864946208073815480 |
| 15 | 1599336782706815943896682999835671375 |
| 16 | 5617211714811070144606976491531059082752 |
[1,1,8,261,18400,2383800,523322208,179218487938, 89683747547520,62708998782383118, 59089857758999295000,72802718522742159383487, 114483047893936622981751744, 225239782463528942954480067562, 545115039824232864946208073815480, 1599336782706815943896682999835671375, 5617211714811070144606976491531059082752] |