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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 41 |
| 2 | 411 |
| 3 | 2051 |
| 4 | 6981 |
| 5 | 18733 |
| 6 | 42783 |
| 7 | 86983 |
| 8 | 161993 |
| 9 | 281713 |
| 10 | 463715 |
| 11 | 729675 |
| 12 | 1105805 |
| 13 | 1623285 |
| 14 | 2318695 |
| 15 | 3234447 |
| 16 | 4419217 |
| 17 | 5928377 |
| 18 | 7824427 |
| 19 | 10177427 |
| 20 | 13065429 |
| 21 | 16574909 |
| 22 | 20801199 |
| 23 | 25848919 |
[1,41,411,2051,6981,18733,42783,86983,161993, 281713,463715,729675,1105805,1623285,2318695, 3234447,4419217,5928377,7824427,10177427,13065429, 16574909,20801199,25848919] |