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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 155 |
| 3 | 464 |
| 4 | 939 |
| 5 | 1764 |
| 6 | 3515 |
| 7 | 6260 |
| 8 | 11055 |
| 9 | 21252 |
| 10 | 37247 |
| 11 | 65192 |
| 12 | 124623 |
| 13 | 217848 |
| 14 | 380723 |
| 15 | 727112 |
| 16 | 1270467 |
| 17 | 2219772 |
| 18 | 4238675 |
| 19 | 7405580 |
| 20 | 12938535 |
| 21 | 24705564 |
| 22 | 43163639 |
| 23 | 75412064 |
| 24 | 143995335 |
| 25 | 251576880 |
| 26 | 439534475 |
| 27 | 839267072 |
| 28 | 1466298267 |
| 29 | 2561795412 |
| 30 | 4891607723 |
[0,155,464,939,1764,3515,6260,11055,21252,37247, 65192,124623,217848,380723,727112,1270467,2219772, 4238675,7405580,12938535,24705564,43163639, 75412064,143995335,251576880,439534475,839267072, 1466298267,2561795412,4891607723] |