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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 6 |
| 3 | 26 |
| 4 | 69 |
| 5 | 146 |
| 6 | 270 |
| 7 | 456 |
| 8 | 721 |
| 9 | 1084 |
| 10 | 1566 |
| 11 | 2190 |
| 12 | 2981 |
| 13 | 3966 |
| 14 | 5174 |
| 15 | 6636 |
| 16 | 8385 |
| 17 | 10456 |
| 18 | 12886 |
| 19 | 15714 |
| 20 | 18981 |
| 21 | 22730 |
| 22 | 27006 |
| 23 | 31856 |
| 24 | 37329 |
| 25 | 43476 |
| 26 | 50350 |
| 27 | 58006 |
| 28 | 66501 |
| 29 | 75894 |
| 30 | 86246 |
| 31 | 97620 |
| 32 | 110081 |
| 33 | 123696 |
| 34 | 138534 |
| 35 | 154666 |
| 36 | 172165 |
| 37 | 191106 |
| 38 | 211566 |
| 39 | 233624 |
[0,6,26,69,146,270,456,721,1084,1566,2190,2981, 3966,5174,6636,8385,10456,12886,15714,18981,22730, 27006,31856,37329,43476,50350,58006,66501,75894, 86246,97620,110081,123696,138534,154666,172165, 191106,211566,233624] |