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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 2 |
| 2 | 2 |
| 3 | 20 |
| 4 | 28 |
| 5 | 70 |
| 6 | 110 |
| 7 | 192 |
| 8 | 256 |
| 9 | 402 |
| 10 | 498 |
| 11 | 708 |
| 12 | 884 |
| 13 | 1166 |
| 14 | 1422 |
| 15 | 1800 |
| 16 | 2104 |
| 17 | 2594 |
| 18 | 3026 |
| 19 | 3588 |
| 20 | 4140 |
| 21 | 4918 |
| 22 | 5542 |
| 23 | 6432 |
| 24 | 7224 |
| 25 | 8186 |
| 26 | 9122 |
| 27 | 10380 |
| 28 | 11460 |
| 29 | 12790 |
| 30 | 14094 |
| 31 | 15624 |
| 32 | 17080 |
| 33 | 18882 |
| 34 | 20458 |
| 35 | 22500 |
| 36 | 24364 |
| 37 | 26590 |
| 38 | 28678 |
| 39 | 31136 |
| 40 | 33400 |
[0,2,2,20,28,70,110,192,256,402,498,708,884,1166, 1422,1800,2104,2594,3026,3588,4140,4918,5542,6432, 7224,8186,9122,10380,11460,12790,14094,15624, 17080,18882,20458,22500,24364,26590,28678,31136, 33400] |