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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 13 |
| 2 | 79 |
| 3 | 307 |
| 4 | 886 |
| 5 | 2086 |
| 6 | 4258 |
| 7 | 7834 |
| 8 | 13327 |
| 9 | 21331 |
| 10 | 32521 |
| 11 | 47653 |
| 12 | 67564 |
| 13 | 93172 |
| 14 | 125476 |
| 15 | 165556 |
| 16 | 214573 |
| 17 | 273769 |
| 18 | 344467 |
| 19 | 428071 |
| 20 | 526066 |
| 21 | 640018 |
| 22 | 771574 |
| 23 | 922462 |
| 24 | 1094491 |
| 25 | 1289551 |
| 26 | 1509613 |
| 27 | 1756729 |
| 28 | 2033032 |
| 29 | 2340736 |
| 30 | 2682136 |
| 31 | 3059608 |
[1,13,79,307,886,2086,4258,7834,13327,21331,32521, 47653,67564,93172,125476,165556,214573,273769, 344467,428071,526066,640018,771574,922462,1094491, 1289551,1509613,1756729,2033032,2340736,2682136, 3059608] |