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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 16 |
| 3 | 36 |
| 4 | 147 |
| 5 | 417 |
| 6 | 1353 |
| 7 | 4095 |
| 8 | 12853 |
| 9 | 39489 |
| 10 | 123210 |
| 11 | 380280 |
| 12 | 1182026 |
| 13 | 3659119 |
| 14 | 11351061 |
| 15 | 35179874 |
| 16 | 109070933 |
| 17 | 338113844 |
| 18 | 1048217069 |
| 19 | 3249453631 |
| 20 | 10073853147 |
| 21 | 31229167798 |
| 22 | 96814146538 |
| 23 | 300130174990 |
| 24 | 930430509302 |
| 25 | 2884410320136 |
[1,16,36,147,417,1353,4095,12853,39489,123210, 380280,1182026,3659119,11351061,35179874, 109070933,338113844,1048217069,3249453631, 10073853147,31229167798,96814146538,300130174990, 930430509302,2884410320136] |