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| n | a(n) |
|---|---|
| 4 | 1 |
| 5 | 2801 |
| 6 | 6865251 |
| 7 | 16531644851 |
| 8 | 39709010932102 |
| 9 | 95347005938577702 |
| 10 | 228930106321885702602 |
| 11 | 549661852436388016181802 |
| 12 | 1319738336534843578720956303 |
| 13 | 3168691824510592423395247884703 |
| 14 | 7608029097572151019476340332672053 |
[1,2801,6865251,16531644851,39709010932102, 95347005938577702,228930106321885702602, 549661852436388016181802, 1319738336534843578720956303, 3168691824510592423395247884703, 7608029097572151019476340332672053] |