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| n | a(n) |
|---|---|
| 1 | 12 |
| 2 | 144 |
| 3 | 971 |
| 4 | 5626 |
| 5 | 35079 |
| 6 | 230877 |
| 7 | 1512392 |
| 8 | 9787958 |
| 9 | 63259244 |
| 10 | 409715970 |
| 11 | 2655276933 |
| 12 | 17202889943 |
| 13 | 111435906926 |
| 14 | 721881185963 |
| 15 | 4676493715792 |
| 16 | 30295147280715 |
| 17 | 196256042632128 |
| 18 | 1271373728805624 |
| 19 | 8236145058768675 |
[12,144,971,5626,35079,230877,1512392,9787958, 63259244,409715970,2655276933,17202889943, 111435906926,721881185963,4676493715792, 30295147280715,196256042632128,1271373728805624, 8236145058768675] |