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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 6 |
| 3 | 26 |
| 4 | 86 |
| 5 | 211 |
| 6 | 426 |
| 7 | 758 |
| 8 | 1234 |
| 9 | 1881 |
| 10 | 2726 |
| 11 | 3796 |
| 12 | 5118 |
| 13 | 6719 |
| 14 | 8626 |
| 15 | 10866 |
| 16 | 13466 |
| 17 | 16453 |
| 18 | 19854 |
| 19 | 23696 |
| 20 | 28006 |
| 21 | 32811 |
| 22 | 38138 |
| 23 | 44014 |
| 24 | 50466 |
| 25 | 57521 |
| 26 | 65206 |
| 27 | 73548 |
| 28 | 82574 |
| 29 | 92311 |
| 30 | 102786 |
| 31 | 114026 |
| 32 | 126058 |
| 33 | 138909 |
| 34 | 152606 |
| 35 | 167176 |
| 36 | 182646 |
| 37 | 199043 |
| 38 | 216394 |
| 39 | 234726 |
| 40 | 254066 |
[1,6,26,86,211,426,758,1234,1881,2726,3796,5118, 6719,8626,10866,13466,16453,19854,23696,28006, 32811,38138,44014,50466,57521,65206,73548,82574, 92311,102786,114026,126058,138909,152606,167176, 182646,199043,216394,234726,254066] |