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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 3 |
| 3 | 16 |
| 4 | 37 |
| 5 | 117 |
| 6 | 372 |
| 7 | 1168 |
| 8 | 3613 |
| 9 | 11247 |
| 10 | 35047 |
| 11 | 109150 |
| 12 | 339828 |
| 13 | 1058164 |
| 14 | 3295056 |
| 15 | 10260427 |
| 16 | 31949551 |
| 17 | 99486794 |
| 18 | 309789423 |
| 19 | 964645058 |
| 20 | 3003782043 |
| 21 | 9353396014 |
| 22 | 29125288852 |
| 23 | 90692454357 |
| 24 | 282404795252 |
| 25 | 879372700786 |
| 26 | 2738255017364 |
[1,3,16,37,117,372,1168,3613,11247,35047,109150, 339828,1058164,3295056,10260427,31949551,99486794, 309789423,964645058,3003782043,9353396014, 29125288852,90692454357,282404795252,879372700786, 2738255017364] |