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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 6 |
| 2 | 86 |
| 3 | 1116 |
| 4 | 13346 |
| 5 | 153276 |
| 6 | 1724906 |
| 7 | 19207236 |
| 8 | 212679266 |
| 9 | 2347869996 |
| 10 | 25876958426 |
| 11 | 284948873556 |
| 12 | 3136251594386 |
| 13 | 34509651449916 |
| 14 | 379671469419146 |
| 15 | 4176777984431076 |
| 16 | 45946908753664706 |
| 17 | 505430101839849036 |
[1,6,86,1116,13346,153276,1724906,19207236, 212679266,2347869996,25876958426,284948873556, 3136251594386,34509651449916,379671469419146, 4176777984431076,45946908753664706, 505430101839849036] |