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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 1 |
| 3 | 1 |
| 4 | 1 |
| 5 | 124 |
| 6 | 3423 |
| 7 | 33533 |
| 8 | 158877 |
| 9 | 490403 |
| 10 | 1156178 |
| 11 | 2286874 |
| 12 | 4013538 |
| 13 | 6467242 |
| 14 | 9779058 |
| 15 | 14080058 |
| 16 | 19501314 |
| 17 | 26173898 |
| 18 | 34228882 |
| 19 | 43797338 |
| 20 | 55010338 |
| 21 | 67998954 |
| 22 | 82894258 |
| 23 | 99827322 |
| 24 | 118929218 |
| 25 | 140331018 |
| 26 | 164163794 |
| 27 | 190558618 |
| 28 | 219646562 |
[1,1,1,1,124,3423,33533,158877,490403,1156178, 2286874,4013538,6467242,9779058,14080058,19501314, 26173898,34228882,43797338,55010338,67998954, 82894258,99827322,118929218,140331018,164163794, 190558618,219646562] |