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| n | a(n) |
|---|---|
| 1 | 16 |
| 2 | 89 |
| 3 | 289 |
| 4 | 673 |
| 5 | 1961 |
| 6 | 8829 |
| 7 | 33853 |
| 8 | 122356 |
| 9 | 439781 |
| 10 | 1684392 |
| 11 | 6453460 |
| 12 | 24681438 |
| 13 | 94429284 |
| 14 | 362493684 |
| 15 | 1391521355 |
| 16 | 5344223744 |
| 17 | 20538410002 |
| 18 | 78964625841 |
| 19 | 303575679612 |
| 20 | 1167193062685 |
| 21 | 4488137643340 |
| 22 | 17259059593492 |
| 23 | 66369856821954 |
[16,89,289,673,1961,8829,33853,122356,439781, 1684392,6453460,24681438,94429284,362493684, 1391521355,5344223744,20538410002,78964625841, 303575679612,1167193062685,4488137643340, 17259059593492,66369856821954] |