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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 4 |
| 2 | 16 |
| 3 | 42 |
| 4 | 90 |
| 5 | 172 |
| 6 | 296 |
| 7 | 482 |
| 8 | 740 |
| 9 | 1092 |
| 10 | 1554 |
| 11 | 2154 |
| 12 | 2906 |
| 13 | 3846 |
| 14 | 4992 |
| 15 | 6382 |
| 16 | 8038 |
| 17 | 10004 |
| 18 | 12302 |
| 19 | 14984 |
| 20 | 18074 |
| 21 | 21626 |
| 22 | 25670 |
| 23 | 30266 |
| 24 | 35442 |
| 25 | 41266 |
| 26 | 47770 |
| 27 | 55024 |
| 28 | 63064 |
| 29 | 71966 |
| 30 | 81766 |
| 31 | 92548 |
| 32 | 104350 |
| 33 | 117258 |
| 34 | 131316 |
| 35 | 146616 |
| 36 | 163200 |
| 37 | 181168 |
| 38 | 200566 |
[0,4,16,42,90,172,296,482,740,1092,1554,2154,2906, 3846,4992,6382,8038,10004,12302,14984,18074,21626, 25670,30266,35442,41266,47770,55024,63064,71966, 81766,92548,104350,117258,131316,146616,163200, 181168,200566] |