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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 0 |
| 2 | 2 |
| 3 | 4 |
| 4 | 12 |
| 5 | 16 |
| 6 | 48 |
| 7 | 60 |
| 8 | 148 |
| 9 | 220 |
| 10 | 438 |
| 11 | 618 |
| 12 | 1302 |
| 13 | 1740 |
| 14 | 3216 |
| 15 | 4788 |
| 16 | 8170 |
| 17 | 11512 |
| 18 | 19862 |
| 19 | 27570 |
| 20 | 45448 |
| 21 | 64600 |
| 22 | 100808 |
| 23 | 141724 |
| 24 | 223080 |
| 25 | 307512 |
| 26 | 465736 |
| 27 | 652518 |
| 28 | 968180 |
| 29 | 1334030 |
| 30 | 1972164 |
| 31 | 2691132 |
| 32 | 3902432 |
| 33 | 5347176 |
| 34 | 7611484 |
| 35 | 10358426 |
| 36 | 14697028 |
| 37 | 19790508 |
| 38 | 27691500 |
[1,0,2,4,12,16,48,60,148,220,438,618,1302,1740, 3216,4788,8170,11512,19862,27570,45448,64600, 100808,141724,223080,307512,465736,652518,968180, 1334030,1972164,2691132,3902432,5347176,7611484, 10358426,14697028,19790508,27691500] |