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| n | a(n) |
|---|---|
| 2 | 0 |
| 3 | 3 |
| 4 | 19 |
| 5 | 75 |
| 6 | 218 |
| 7 | 542 |
| 8 | 1178 |
| 9 | 2350 |
| 10 | 4340 |
| 11 | 7585 |
| 12 | 12605 |
| 13 | 20153 |
| 14 | 31094 |
| 15 | 46620 |
| 16 | 68068 |
| 17 | 97212 |
| 18 | 136008 |
| 19 | 186975 |
| 20 | 252855 |
| 21 | 337095 |
| 22 | 443410 |
| 23 | 576378 |
| 24 | 740894 |
| 25 | 942890 |
| 26 | 1188668 |
| 27 | 1485757 |
| 28 | 1842113 |
| 29 | 2267125 |
| 30 | 2770670 |
| 31 | 3364280 |
| 32 | 4060040 |
| 33 | 4871928 |
| 34 | 5814544 |
| 35 | 6904635 |
| 36 | 8159643 |
| 37 | 9599427 |
[0,3,19,75,218,542,1178,2350,4340,7585,12605, 20153,31094,46620,68068,97212,136008,186975, 252855,337095,443410,576378,740894,942890,1188668, 1485757,1842113,2267125,2770670,3364280,4060040, 4871928,5814544,6904635,8159643,9599427] |