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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 3 |
| 3 | 4 |
| 4 | 7 |
| 5 | 67 |
| 6 | 74 |
| 7 | 733 |
| 8 | 807 |
| 9 | 1540 |
| 10 | 3887 |
| 11 | 5427 |
| 12 | 166697 |
| 13 | 172124 |
| 14 | 510945 |
| 15 | 683069 |
| 16 | 1194014 |
| 17 | 11429195 |
| 18 | 12623209 |
| 19 | 125038076 |
| 20 | 137661285 |
| 21 | 262699361 |
| 22 | 663060007 |
| 23 | 925759368 |
| 24 | 28435841047 |
| 25 | 29361600415 |
| 26 | 87159041877 |
[1,1,3,4,7,67,74,733,807,1540,3887,5427,166697, 172124,510945,683069,1194014,11429195,12623209, 125038076,137661285,262699361,663060007,925759368, 28435841047,29361600415,87159041877] |