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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 61 |
| 3 | 151 |
| 4 | 2397 |
| 5 | 26845 |
| 6 | 219766 |
| 7 | 2442827 |
| 8 | 24591846 |
| 9 | 242436003 |
| 10 | 2489759311 |
| 11 | 25088620389 |
| 12 | 253084531775 |
| 13 | 2564305503462 |
| 14 | 25906203943718 |
| 15 | 261893439208183 |
| 16 | 2648516039714157 |
| 17 | 26773920420375519 |
| 18 | 270697739532698029 |
[0,61,151,2397,26845,219766,2442827,24591846, 242436003,2489759311,25088620389,253084531775, 2564305503462,25906203943718,261893439208183, 2648516039714157,26773920420375519, 270697739532698029] |