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| n | a(n) |
|---|---|
| 10 | 1 |
| 11 | 56 |
| 12 | 1762 |
| 13 | 41143 |
| 14 | 795657 |
| 15 | 13499449 |
| 16 | 208050040 |
| 17 | 2979881876 |
| 18 | 40300054520 |
| 19 | 520576172762 |
| 20 | 6478447651345 |
| 21 | 78185947269684 |
| 22 | 919805200917658 |
| 23 | 10591351937396242 |
| 24 | 119764715367192468 |
| 25 | 1333512940732309728 |
| 26 | 14652754322423701707 |
| 27 | 159182411488944508232 |
[1,56,1762,41143,795657,13499449,208050040, 2979881876,40300054520,520576172762,6478447651345, 78185947269684,919805200917658,10591351937396242, 119764715367192468,1333512940732309728, 14652754322423701707,159182411488944508232] |