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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 4 |
| 3 | 4 |
| 4 | 83 |
| 5 | 87 |
| 6 | 430 |
| 7 | 660 |
| 8 | 9039 |
| 9 | 47028 |
| 10 | 128352 |
| 11 | 157861 |
| 12 | 241465 |
| 13 | 362709 |
| 14 | 9031153 |
| 15 | 11990180 |
| 16 | 89103542 |
| 17 | 102393518 |
| 18 | 318327464 |
| 19 | 361501552 |
| 20 | 1119756916 |
| 21 | 1310133018 |
| 22 | 1995850459 |
| 23 | 20709593111 |
| 24 | 94478870265 |
| 25 | 105076191441 |
| 26 | 123229448284 |
| 27 | 5619694006942 |
| 28 | 8033666701549 |
[1,4,4,83,87,430,660,9039,47028,128352,157861, 241465,362709,9031153,11990180,89103542,102393518, 318327464,361501552,1119756916,1310133018, 1995850459,20709593111,94478870265,105076191441, 123229448284,5619694006942,8033666701549] |