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A292713 as a simple table
| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 4 |
| 3 | 14 |
| 4 | 67 |
| 5 | 343 |
| 6 | 2151 |
| 7 | 14900 |
| 8 | 119259 |
| 9 | 1055520 |
| 10 | 10465854 |
| 11 | 113479756 |
| 12 | 1350508150 |
| 13 | 17373376892 |
| 14 | 241576630993 |
| 15 | 3596468789967 |
| 16 | 57232276979726 |
| 17 | 967517444008250 |
| 18 | 17339617861447844 |
| 19 | 328037083000497867 |
| 20 | 6537494747743375847 |
| 21 | 136820214583596515519 |
[1,1,4,14,67,343,2151,14900,119259,1055520, 10465854,113479756,1350508150,17373376892, 241576630993,3596468789967,57232276979726, 967517444008250,17339617861447844, 328037083000497867,6537494747743375847, 136820214583596515519] |