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| n | a(n) |
|---|---|
| 1 | 4 |
| 2 | 16 |
| 3 | 57 |
| 4 | 164 |
| 5 | 403 |
| 6 | 870 |
| 7 | 1535 |
| 8 | 3393 |
| 9 | 6492 |
| 10 | 10075 |
| 11 | 16250 |
| 12 | 22837 |
| 13 | 35092 |
| 14 | 53862 |
| 15 | 77929 |
| 16 | 102925 |
| 17 | 130837 |
| 18 | 163010 |
| 19 | 189773 |
| 20 | 245903 |
| 21 | 330117 |
| 22 | 413691 |
| 23 | 508391 |
| 24 | 599788 |
| 25 | 680172 |
| 26 | 767719 |
| 27 | 864615 |
| 28 | 945420 |
| 29 | 1075524 |
| 30 | 1189739 |
| 31 | 1217843 |
| 32 | 1282919 |
| 33 | 1376563 |
| 34 | 1465693 |
| 35 | 1505040 |
[4,16,57,164,403,870,1535,3393,6492,10075,16250, 22837,35092,53862,77929,102925,130837,163010, 189773,245903,330117,413691,508391,599788,680172, 767719,864615,945420,1075524,1189739,1217843, 1282919,1376563,1465693,1505040] |