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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 1 |
| 2 | 12 |
| 3 | 57 |
| 4 | 172 |
| 5 | 405 |
| 6 | 816 |
| 7 | 1477 |
| 8 | 2472 |
| 9 | 3897 |
| 10 | 5860 |
| 11 | 8481 |
| 12 | 11892 |
| 13 | 16237 |
| 14 | 21672 |
| 15 | 28365 |
| 16 | 36496 |
| 17 | 46257 |
| 18 | 57852 |
| 19 | 71497 |
| 20 | 87420 |
| 21 | 105861 |
| 22 | 127072 |
| 23 | 151317 |
| 24 | 178872 |
| 25 | 210025 |
| 26 | 245076 |
| 27 | 284337 |
| 28 | 328132 |
| 29 | 376797 |
| 30 | 430680 |
| 31 | 490141 |
| 32 | 555552 |
| 33 | 627297 |
| 34 | 705772 |
| 35 | 791385 |
| 36 | 884556 |
| 37 | 985717 |
[0,1,12,57,172,405,816,1477,2472,3897,5860,8481, 11892,16237,21672,28365,36496,46257,57852,71497, 87420,105861,127072,151317,178872,210025,245076, 284337,328132,376797,430680,490141,555552,627297, 705772,791385,884556,985717] |