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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 26 |
| 2 | 124 |
| 3 | 1400 |
| 4 | 10000 |
| 5 | 89504 |
| 6 | 707008 |
| 7 | 5924480 |
| 8 | 47900416 |
| 9 | 393069824 |
| 10 | 3189761536 |
| 11 | 25963397888 |
| 12 | 210468531712 |
| 13 | 1706090904320 |
| 14 | 13803141607936 |
| 15 | 111595408530176 |
| 16 | 901164713600512 |
| 17 | 7271581998320384 |
| 18 | 58625571435837952 |
| 19 | 472335388734974720 |
| 20 | 3803021424555945472 |
| 21 | 30602681612309510912 |
| 22 | 246127842107210007040 |
[1,26,124,1400,10000,89504,707008,5924480, 47900416,393069824,3189761536,25963397888, 210468531712,1706090904320,13803141607936, 111595408530176,901164713600512,7271581998320384, 58625571435837952,472335388734974720, 3803021424555945472,30602681612309510912, 246127842107210007040] |