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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 42 |
| 3 | 303 |
| 4 | 1144 |
| 5 | 3105 |
| 6 | 6906 |
| 7 | 13447 |
| 8 | 23808 |
| 9 | 39249 |
| 10 | 61210 |
| 11 | 91311 |
| 12 | 131352 |
| 13 | 183313 |
| 14 | 249354 |
| 15 | 331815 |
| 16 | 433216 |
| 17 | 556257 |
| 18 | 703818 |
| 19 | 878959 |
| 20 | 1084920 |
| 21 | 1325121 |
| 22 | 1603162 |
| 23 | 1922823 |
| 24 | 2288064 |
| 25 | 2703025 |
| 26 | 3172026 |
| 27 | 3699567 |
| 28 | 4290328 |
| 29 | 4949169 |
| 30 | 5681130 |
[1,42,303,1144,3105,6906,13447,23808,39249,61210, 91311,131352,183313,249354,331815,433216,556257, 703818,878959,1084920,1325121,1603162,1922823, 2288064,2703025,3172026,3699567,4290328,4949169, 5681130] |