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| n | a(n) |
|---|---|
| 4 | 10 |
| 5 | 30 |
| 6 | 95 |
| 7 | 311 |
| 8 | 1043 |
| 9 | 3564 |
| 10 | 12363 |
| 11 | 43420 |
| 12 | 154088 |
| 13 | 551684 |
| 14 | 1990326 |
| 15 | 7228417 |
| 16 | 26405725 |
| 17 | 96961560 |
| 18 | 357688755 |
| 19 | 1324982160 |
| 20 | 4926502020 |
| 21 | 18379785300 |
| 22 | 68783559810 |
| 23 | 258141170430 |
| 24 | 971310800694 |
| 25 | 3663524817768 |
| 26 | 13848466284350 |
[10,30,95,311,1043,3564,12363,43420,154088,551684, 1990326,7228417,26405725,96961560,357688755, 1324982160,4926502020,18379785300,68783559810, 258141170430,971310800694,3663524817768, 13848466284350] |