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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 0 |
| 2 | 0 |
| 3 | 0 |
| 4 | 0 |
| 5 | 0 |
| 6 | 2 |
| 7 | 2 |
| 8 | 4 |
| 9 | 6 |
| 10 | 24 |
| 11 | 26 |
| 12 | 46 |
| 13 | 64 |
| 14 | 100 |
| 15 | 224 |
| 16 | 276 |
| 17 | 416 |
| 18 | 590 |
| 19 | 850 |
| 20 | 1144 |
| 21 | 2214 |
| 22 | 2644 |
| 23 | 3938 |
| 24 | 5282 |
| 25 | 7504 |
| 26 | 9776 |
| 27 | 13704 |
| 28 | 21984 |
| 29 | 27632 |
| 30 | 38426 |
| 31 | 51562 |
| 32 | 69844 |
| 33 | 91950 |
| 34 | 123504 |
| 35 | 159658 |
| 36 | 246830 |
| 37 | 303400 |
| 38 | 416068 |
| 39 | 540480 |
| 40 | 730268 |
| 41 | 933176 |
| 42 | 1248110 |
[0,0,0,0,0,0,2,2,4,6,24,26,46,64,100,224,276,416, 590,850,1144,2214,2644,3938,5282,7504,9776,13704, 21984,27632,38426,51562,69844,91950,123504,159658, 246830,303400,416068,540480,730268,933176,1248110] |