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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 1 |
| 2 | 5 |
| 3 | 11 |
| 4 | 191 |
| 5 | 1007 |
| 6 | 14867 |
| 7 | 255107 |
| 8 | 9129053 |
| 9 | 67327193 |
| 10 | 4529184593 |
| 11 | 166271515343 |
| 12 | 4779162788333 |
| 13 | 138352449214913 |
| 14 | 3789355611541433 |
| 15 | 239279059581601973 |
| 16 | 24834870363121258373 |
| 17 | 1393579526405103137033 |
| 18 | 18698422677793016888663 |
| 19 | 2129889287147118494587523 |
| 20 | 536495754760605278294365643 |
| 21 | 21180306469448466834088735073 |
[0,1,5,11,191,1007,14867,255107,9129053,67327193, 4529184593,166271515343,4779162788333, 138352449214913,3789355611541433, 239279059581601973,24834870363121258373, 1393579526405103137033,18698422677793016888663, 2129889287147118494587523, 536495754760605278294365643, 21180306469448466834088735073] |