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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 4 |
| 3 | 28 |
| 4 | 102 |
| 5 | 268 |
| 6 | 580 |
| 7 | 1104 |
| 8 | 1918 |
| 9 | 3112 |
| 10 | 4788 |
| 11 | 7060 |
| 12 | 10054 |
| 13 | 13908 |
| 14 | 18772 |
| 15 | 24808 |
| 16 | 32190 |
| 17 | 41104 |
| 18 | 51748 |
| 19 | 64332 |
| 20 | 79078 |
| 21 | 96220 |
| 22 | 116004 |
| 23 | 138688 |
| 24 | 164542 |
| 25 | 193848 |
| 26 | 226900 |
| 27 | 264004 |
| 28 | 305478 |
| 29 | 351652 |
| 30 | 402868 |
| 31 | 459480 |
| 32 | 521854 |
| 33 | 590368 |
| 34 | 665412 |
| 35 | 747388 |
| 36 | 836710 |
| 37 | 933804 |
| 38 | 1039108 |
[0,4,28,102,268,580,1104,1918,3112,4788,7060, 10054,13908,18772,24808,32190,41104,51748,64332, 79078,96220,116004,138688,164542,193848,226900, 264004,305478,351652,402868,459480,521854,590368, 665412,747388,836710,933804,1039108] |