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| n | a(n) |
|---|---|
| 4 | 2 |
| 5 | 7 |
| 6 | 22 |
| 7 | 54 |
| 8 | 118 |
| 9 | 230 |
| 10 | 418 |
| 11 | 710 |
| 12 | 1150 |
| 13 | 1783 |
| 14 | 2672 |
| 15 | 3882 |
| 16 | 5500 |
| 17 | 7614 |
| 18 | 10338 |
| 19 | 13788 |
| 20 | 18108 |
| 21 | 23445 |
| 22 | 29978 |
| 23 | 37888 |
| 24 | 47392 |
| 25 | 58710 |
| 26 | 72100 |
| 27 | 87824 |
| 28 | 106186 |
| 29 | 127493 |
| 30 | 152098 |
| 31 | 180358 |
| 32 | 212678 |
| 33 | 249468 |
| 34 | 291190 |
| 35 | 338310 |
| 36 | 391350 |
| 37 | 450837 |
| 38 | 517356 |
| 39 | 591498 |
| 40 | 673916 |
[2,7,22,54,118,230,418,710,1150,1783,2672,3882, 5500,7614,10338,13788,18108,23445,29978,37888, 47392,58710,72100,87824,106186,127493,152098, 180358,212678,249468,291190,338310,391350,450837, 517356,591498,673916] |