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| n | a(n) |
|---|---|
| 1 | 16 |
| 2 | 256 |
| 3 | 1152 |
| 4 | 5369 |
| 5 | 29622 |
| 6 | 137719 |
| 7 | 600283 |
| 8 | 2713480 |
| 9 | 12034046 |
| 10 | 52033244 |
| 11 | 225654415 |
| 12 | 977903570 |
| 13 | 4209142915 |
| 14 | 18093980819 |
| 15 | 77797857664 |
| 16 | 334005490934 |
| 17 | 1432816184496 |
| 18 | 6146377438291 |
| 19 | 26358559894264 |
| 20 | 113005090485943 |
[16,256,1152,5369,29622,137719,600283,2713480, 12034046,52033244,225654415,977903570,4209142915, 18093980819,77797857664,334005490934, 1432816184496,6146377438291,26358559894264, 113005090485943] |