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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 11 |
| 3 | 57 |
| 4 | 203 |
| 5 | 574 |
| 6 | 1386 |
| 7 | 2982 |
| 8 | 5874 |
| 9 | 10791 |
| 10 | 18733 |
| 11 | 31031 |
| 12 | 49413 |
| 13 | 76076 |
| 14 | 113764 |
| 15 | 165852 |
| 16 | 236436 |
| 17 | 330429 |
| 18 | 453663 |
| 19 | 612997 |
| 20 | 816431 |
| 21 | 1073226 |
| 22 | 1394030 |
| 23 | 1791010 |
| 24 | 2277990 |
| 25 | 2870595 |
| 26 | 3586401 |
| 27 | 4445091 |
| 28 | 5468617 |
| 29 | 6681368 |
| 30 | 8110344 |
| 31 | 9785336 |
[1,11,57,203,574,1386,2982,5874,10791,18733,31031, 49413,76076,113764,165852,236436,330429,453663, 612997,816431,1073226,1394030,1791010,2277990, 2870595,3586401,4445091,5468617,6681368,8110344, 9785336] |