| n | a(n) |
|---|---|
| 0 | 30 |
| 1 | 31 |
| 2 | 154 |
| 3 | 955 |
| 4 | 1109 |
| 5 | 2064 |
| 6 | 3173 |
| 7 | 14756 |
| 8 | 32685 |
| 9 | 472346 |
| 10 | 505031 |
| 11 | 10067935 |
| 12 | 10572966 |
| 13 | 20640901 |
| 14 | 31213867 |
| 15 | 51854768 |
| 16 | 1016454459 |
| 17 | 1068309227 |
| 18 | 15972783637 |
| 19 | 33013876501 |
| 20 | 148028289641 |
| 21 | 181042166142 |
[30,31,154,955,1109,2064,3173,14756,32685,472346, 505031,10067935,10572966,20640901,31213867, 51854768,1016454459,1068309227,15972783637, 33013876501,148028289641,181042166142] |