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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 8 |
| 3 | 151 |
| 4 | 5123 |
| 5 | 271396 |
| 6 | 20605133 |
| 7 | 2116186801 |
| 8 | 282013329788 |
| 9 | 47257934281891 |
| 10 | 9716069206252163 |
| 11 | 2402866414155189016 |
| 12 | 703288162788887287433 |
| 13 | 240323111593250975343601 |
| 14 | 94776477297941909597367248 |
| 15 | 42710529437686482677512782271 |
[1,1,8,151,5123,271396,20605133,2116186801, 282013329788,47257934281891,9716069206252163, 2402866414155189016,703288162788887287433, 240323111593250975343601, 94776477297941909597367248, 42710529437686482677512782271] |