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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 10 |
| 3 | 78 |
| 4 | 561 |
| 5 | 3885 |
| 6 | 26565 |
| 7 | 180285 |
| 8 | 1221554 |
| 9 | 8272252 |
| 10 | 56063900 |
| 11 | 380361212 |
| 12 | 2583878630 |
| 13 | 17575724491 |
| 14 | 119705606020 |
| 15 | 816297170565 |
| 16 | 5572946307857 |
| 17 | 38088275031435 |
| 18 | 260576838539320 |
| 19 | 1784382167211378 |
| 20 | 12229792806897910 |
| 21 | 83888652677221112 |
| 22 | 575858960208964685 |
| 23 | 3955813057814040153 |
| 24 | 27192049709537787123 |
| 25 | 187032147327469550926 |
| 26 | 1287187641890879422980 |
| 27 | 8863461073824746853534 |
| 28 | 61064188079233277265138 |
| 29 | 420899733623010047381885 |
| 30 | 2902469328540659624278455 |
[1,10,78,561,3885,26565,180285,1221554,8272252, 56063900,380361212,2583878630,17575724491, 119705606020,816297170565,5572946307857, 38088275031435,260576838539320,1784382167211378, 12229792806897910,83888652677221112, 575858960208964685,3955813057814040153, 27192049709537787123,187032147327469550926, 1287187641890879422980,8863461073824746853534, 61064188079233277265138,420899733623010047381885, 2902469328540659624278455] |