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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 6 |
| 3 | 18 |
| 4 | 40 |
| 5 | 76 |
| 6 | 129 |
| 7 | 202 |
| 8 | 298 |
| 9 | 420 |
| 10 | 572 |
| 11 | 757 |
| 12 | 978 |
| 13 | 1239 |
| 14 | 1543 |
| 15 | 1893 |
| 16 | 2292 |
| 17 | 2743 |
| 18 | 3250 |
| 19 | 3816 |
| 20 | 4444 |
| 21 | 5137 |
| 22 | 5898 |
| 23 | 6731 |
| 24 | 7639 |
| 25 | 8625 |
| 26 | 9693 |
| 27 | 10846 |
| 28 | 12087 |
| 29 | 13419 |
| 30 | 14845 |
| 31 | 16369 |
| 32 | 17994 |
| 33 | 19723 |
| 34 | 21560 |
| 35 | 23508 |
| 36 | 25570 |
| 37 | 27749 |
| 38 | 30048 |
| 39 | 32471 |
| 40 | 35021 |
[1,6,18,40,76,129,202,298,420,572,757,978,1239, 1543,1893,2292,2743,3250,3816,4444,5137,5898,6731, 7639,8625,9693,10846,12087,13419,14845,16369, 17994,19723,21560,23508,25570,27749,30048,32471, 35021] |