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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 2 |
| 2 | 6 |
| 3 | 12 |
| 4 | 20 |
| 5 | 40 |
| 6 | 88 |
| 7 | 208 |
| 8 | 464 |
| 9 | 608 |
| 10 | 1632 |
| 11 | 2112 |
| 12 | 5696 |
| 13 | 8576 |
| 14 | 21888 |
| 15 | 33024 |
| 16 | 86272 |
| 17 | 220672 |
| 18 | 318976 |
| 19 | 865280 |
| 20 | 1307648 |
| 21 | 3414016 |
| 22 | 4954112 |
| 23 | 13930496 |
| 24 | 19238912 |
| 25 | 56614912 |
| 26 | 79290368 |
| 27 | 222248960 |
| 28 | 307970048 |
| 29 | 1048150016 |
| 30 | 1568243712 |
| 31 | 2967011328 |
| 32 | 8084062208 |
| 33 | 15806103552 |
[1,2,6,12,20,40,88,208,464,608,1632,2112,5696, 8576,21888,33024,86272,220672,318976,865280, 1307648,3414016,4954112,13930496,19238912, 56614912,79290368,222248960,307970048,1048150016, 1568243712,2967011328,8084062208,15806103552] |