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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 5 |
| 3 | 6 |
| 4 | 27 |
| 5 | 57 |
| 6 | 87 |
| 7 | 161 |
| 8 | 361 |
| 9 | 898 |
| 10 | 1984 |
| 11 | 4089 |
| 12 | 8938 |
| 13 | 20136 |
| 14 | 45253 |
| 15 | 100907 |
| 16 | 226408 |
| 17 | 508923 |
| 18 | 1143285 |
| 19 | 2565894 |
| 20 | 5762902 |
| 21 | 12955110 |
| 22 | 29139440 |
| 23 | 65553446 |
| 24 | 147496388 |
| 25 | 331934544 |
| 26 | 747140540 |
| 27 | 1681925878 |
| 28 | 3786696312 |
| 29 | 8526308067 |
| 30 | 19200092288 |
[0,5,6,27,57,87,161,361,898,1984,4089,8938,20136, 45253,100907,226408,508923,1143285,2565894, 5762902,12955110,29139440,65553446,147496388, 331934544,747140540,1681925878,3786696312, 8526308067,19200092288] |