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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 69 |
| 2 | 1031 |
| 3 | 6889 |
| 4 | 29473 |
| 5 | 95389 |
| 6 | 255263 |
| 7 | 595281 |
| 8 | 1251025 |
| 9 | 2423605 |
| 10 | 4398087 |
| 11 | 7564217 |
| 12 | 12439441 |
| 13 | 19694221 |
| 14 | 30179647 |
| 15 | 44957345 |
| 16 | 65331681 |
| 17 | 92884261 |
| 18 | 129510727 |
| 19 | 177459849 |
| 20 | 239374913 |
| 21 | 318337405 |
| 22 | 417912991 |
| 23 | 542199793 |
| 24 | 695878961 |
[1,69,1031,6889,29473,95389,255263,595281,1251025, 2423605,4398087,7564217,12439441,19694221, 30179647,44957345,65331681,92884261,129510727, 177459849,239374913,318337405,417912991,542199793, 695878961] |