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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 4 |
| 2 | 12 |
| 3 | 40 |
| 4 | 100 |
| 5 | 216 |
| 6 | 472 |
| 7 | 896 |
| 8 | 1580 |
| 9 | 2732 |
| 10 | 4408 |
| 11 | 6816 |
| 12 | 10400 |
| 13 | 15280 |
| 14 | 22000 |
| 15 | 31088 |
| 16 | 43308 |
| 17 | 58072 |
| 18 | 78804 |
| 19 | 102176 |
| 20 | 134056 |
| 21 | 169408 |
| 22 | 218320 |
| 23 | 268228 |
| 24 | 339768 |
| 25 | 409244 |
| 26 | 507744 |
| 27 | 603368 |
| 28 | 738000 |
| 29 | 859424 |
| 30 | 1041376 |
| 31 | 1200664 |
| 32 | 1435908 |
| 33 | 1639184 |
| 34 | 1943224 |
| 35 | 2186656 |
[1,4,12,40,100,216,472,896,1580,2732,4408,6816, 10400,15280,22000,31088,43308,58072,78804,102176, 134056,169408,218320,268228,339768,409244,507744, 603368,738000,859424,1041376,1200664,1435908, 1639184,1943224,2186656] |