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| n | a(n) |
|---|---|
| 1 | 4 |
| 2 | 26 |
| 3 | 66 |
| 4 | 26 |
| 5 | 302 |
| 6 | 302 |
| 7 | 120 |
| 8 | 2416 |
| 9 | 120 |
| 10 | 502 |
| 11 | 14608 |
| 12 | 88234 |
| 13 | 156190 |
| 14 | 88234 |
| 15 | 14608 |
| 16 | 502 |
| 17 | 47840 |
| 18 | 455192 |
| 19 | 1310354 |
| 20 | 1310354 |
| 21 | 455192 |
| 22 | 47840 |
| 23 | 2036 |
| 24 | 2203488 |
| 25 | 9738114 |
| 26 | 15724248 |
| 27 | 9738114 |
| 28 | 2203488 |
| 29 | 2036 |
| 30 | 66318474 |
| 31 | 162512286 |
| 32 | 162512286 |
| 33 | 66318474 |
[4,26,66,26,302,302,120,2416,120,502,14608,88234, 156190,88234,14608,502,47840,455192,1310354, 1310354,455192,47840,2036,2203488,9738114, 15724248,9738114,2203488,2036,66318474,162512286, 162512286,66318474] |