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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 2 |
| 2 | 6 |
| 3 | 12 |
| 4 | 22 |
| 5 | 40 |
| 6 | 68 |
| 7 | 112 |
| 8 | 182 |
| 9 | 286 |
| 10 | 440 |
| 11 | 668 |
| 12 | 996 |
| 13 | 1464 |
| 14 | 2128 |
| 15 | 3056 |
| 16 | 4342 |
| 17 | 6116 |
| 18 | 8538 |
| 19 | 11820 |
| 20 | 16248 |
| 21 | 22176 |
| 22 | 30068 |
| 23 | 40528 |
| 24 | 54308 |
| 25 | 72378 |
| 26 | 95976 |
| 27 | 126648 |
| 28 | 166352 |
| 29 | 217560 |
| 30 | 283344 |
| 31 | 367552 |
| 32 | 474998 |
| 33 | 611624 |
| 34 | 784812 |
| 35 | 1003712 |
| 36 | 1279562 |
| 37 | 1626216 |
| 38 | 2060708 |
| 39 | 2603856 |
[1,2,6,12,22,40,68,112,182,286,440,668,996,1464, 2128,3056,4342,6116,8538,11820,16248,22176,30068, 40528,54308,72378,95976,126648,166352,217560, 283344,367552,474998,611624,784812,1003712, 1279562,1626216,2060708,2603856] |