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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 580 |
| 3 | 580 |
| 4 | 2366 |
| 5 | 11354 |
| 6 | 2366 |
| 7 | 22236 |
| 8 | 172026 |
| 9 | 172026 |
| 10 | 22236 |
| 11 | 118616 |
| 12 | 3017724 |
| 13 | 4473352 |
| 14 | 3017724 |
| 15 | 118616 |
| 16 | 891506 |
| 17 | 50646550 |
| 18 | 173403770 |
| 19 | 173403770 |
| 20 | 50646550 |
| 21 | 891506 |
| 22 | 5489048 |
| 23 | 873299900 |
| 24 | 5539941616 |
| 25 | 15211806726 |
| 26 | 5539941616 |
| 27 | 873299900 |
[0,580,580,2366,11354,2366,22236,172026,172026, 22236,118616,3017724,4473352,3017724,118616, 891506,50646550,173403770,173403770,50646550, 891506,5489048,873299900,5539941616,15211806726, 5539941616,873299900] |