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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 1 |
| 3 | 2 |
| 4 | 3 |
| 5 | 4 |
| 6 | 67 |
| 7 | 98 |
| 8 | 104 |
| 9 | 651 |
| 10 | 2293 |
| 11 | 3074 |
| 12 | 26691 |
| 13 | 27741 |
| 14 | 704396 |
| 15 | 723296 |
| 16 | 755846 |
| 17 | 883407 |
| 18 | 48616624 |
| 19 | 295979506 |
| 20 | 297379006 |
| 21 | 402327541 |
| 22 | 198522549056 |
| 23 | 204185363456 |
| 24 | 240971251611 |
| 25 | 246467321391 |
| 26 | 303520083621 |
| 27 | 330347455102 |
[0,1,2,3,4,67,98,104,651,2293,3074,26691,27741, 704396,723296,755846,883407,48616624,295979506, 297379006,402327541,198522549056,204185363456, 240971251611,246467321391,303520083621, 330347455102] |