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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 2 |
| 3 | 12 |
| 4 | 40 |
| 5 | 96 |
| 6 | 204 |
| 7 | 368 |
| 8 | 634 |
| 9 | 1012 |
| 10 | 1544 |
| 11 | 2236 |
| 12 | 3186 |
| 13 | 4360 |
| 14 | 5898 |
| 15 | 7764 |
| 16 | 10022 |
| 17 | 12712 |
| 18 | 16026 |
| 19 | 19844 |
| 20 | 24448 |
| 21 | 29708 |
| 22 | 35756 |
| 23 | 42604 |
| 24 | 50602 |
| 25 | 59496 |
| 26 | 69650 |
| 27 | 80940 |
| 28 | 93600 |
| 29 | 107540 |
| 30 | 123316 |
| 31 | 140428 |
| 32 | 159642 |
| 33 | 180632 |
| 34 | 203618 |
| 35 | 228556 |
| 36 | 255822 |
| 37 | 285080 |
| 38 | 317326 |
| 39 | 352020 |
| 40 | 389498 |
[0,2,12,40,96,204,368,634,1012,1544,2236,3186, 4360,5898,7764,10022,12712,16026,19844,24448, 29708,35756,42604,50602,59496,69650,80940,93600, 107540,123316,140428,159642,180632,203618,228556, 255822,285080,317326,352020,389498] |