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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 30 |
| 3 | 201 |
| 4 | 126 |
| 5 | 570 |
| 6 | 3369 |
| 7 | 3873 |
| 8 | 2550 |
| 9 | 14565 |
| 10 | 41958 |
| 11 | 54441 |
| 12 | 62625 |
| 13 | 64641 |
| 14 | 234405 |
| 15 | 254865 |
| 16 | 171990 |
| 17 | 873129 |
| 18 | 954261 |
| 19 | 1036929 |
| 20 | 1004193 |
| 21 | 1044993 |
| 22 | 3755685 |
| 23 | 2788950 |
| 24 | 4083345 |
| 25 | 4165185 |
| 26 | 15285909 |
| 27 | 13978281 |
| 28 | 16075425 |
| 29 | 16399953 |
| 30 | 16730625 |
| 31 | 16599681 |
[0,30,201,126,570,3369,3873,2550,14565,41958, 54441,62625,64641,234405,254865,171990,873129, 954261,1036929,1004193,1044993,3755685,2788950, 4083345,4165185,15285909,13978281,16075425, 16399953,16730625,16599681] |