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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 13 |
| 3 | 49 |
| 4 | 661 |
| 5 | 4021 |
| 6 | 49141 |
| 7 | 382033 |
| 8 | 4387909 |
| 9 | 39174421 |
| 10 | 435947953 |
| 11 | 4223039173 |
| 12 | 46369242349 |
| 13 | 472149790477 |
| 14 | 5166034019173 |
| 15 | 54291944826769 |
| 16 | 594930602047909 |
| 17 | 6384197552441317 |
| 18 | 70225109775221041 |
| 19 | 764509591210501189 |
| 20 | 8448837429195472441 |
| 21 | 92938878099911462521 |
| 22 | 1032029676943832312473 |
[1,1,13,49,661,4021,49141,382033,4387909,39174421, 435947953,4223039173,46369242349,472149790477, 5166034019173,54291944826769,594930602047909, 6384197552441317,70225109775221041, 764509591210501189,8448837429195472441, 92938878099911462521,1032029676943832312473] |