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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 12 |
| 3 | 230 |
| 4 | 5879 |
| 5 | 128076 |
| 6 | 2853634 |
| 7 | 63318470 |
| 8 | 1408047450 |
| 9 | 31296772948 |
| 10 | 695652396949 |
| 11 | 15461913567744 |
| 12 | 343664536672236 |
| 13 | 7638450184626910 |
| 14 | 169775851711606490 |
| 15 | 3773518891128106982 |
| 16 | 83872027453458936923 |
[0,12,230,5879,128076,2853634,63318470,1408047450, 31296772948,695652396949,15461913567744, 343664536672236,7638450184626910, 169775851711606490,3773518891128106982, 83872027453458936923] |