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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 1 |
| 2 | 6 |
| 3 | 11 |
| 4 | 36 |
| 5 | 61 |
| 6 | 86 |
| 7 | 211 |
| 8 | 336 |
| 9 | 461 |
| 10 | 586 |
| 11 | 1211 |
| 12 | 1836 |
| 13 | 2461 |
| 14 | 3086 |
| 15 | 3711 |
| 16 | 6836 |
| 17 | 9961 |
| 18 | 13086 |
| 19 | 16211 |
| 20 | 19336 |
| 21 | 22461 |
| 22 | 38086 |
| 23 | 53711 |
| 24 | 69336 |
| 25 | 84961 |
| 26 | 100586 |
| 27 | 116211 |
| 28 | 131836 |
| 29 | 209961 |
| 30 | 288086 |
| 31 | 366211 |
| 32 | 444336 |
| 33 | 522461 |
| 34 | 600586 |
| 35 | 678711 |
| 36 | 756836 |
| 37 | 1147461 |
| 38 | 1538086 |
| 39 | 1928711 |
[0,1,6,11,36,61,86,211,336,461,586,1211,1836,2461, 3086,3711,6836,9961,13086,16211,19336,22461,38086, 53711,69336,84961,100586,116211,131836,209961, 288086,366211,444336,522461,600586,678711,756836, 1147461,1538086,1928711] |