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| n | a(n) |
|---|---|
| 1 | 2 |
| 2 | 11 |
| 3 | 48 |
| 4 | 166 |
| 5 | 459 |
| 6 | 1125 |
| 7 | 2426 |
| 8 | 4871 |
| 9 | 9028 |
| 10 | 15919 |
| 11 | 26530 |
| 12 | 42795 |
| 13 | 66234 |
| 14 | 100066 |
| 15 | 146708 |
| 16 | 211012 |
| 17 | 295903 |
| 18 | 409009 |
| 19 | 555042 |
| 20 | 743702 |
| 21 | 980297 |
| 22 | 1279677 |
| 23 | 1648401 |
| 24 | 2106146 |
| 25 | 2660304 |
| 26 | 3336122 |
| 27 | 4142715 |
| 28 | 5114735 |
| 29 | 6259510 |
| 30 | 7619959 |
| 31 | 9210010 |
[2,11,48,166,459,1125,2426,4871,9028,15919,26530, 42795,66234,100066,146708,211012,295903,409009, 555042,743702,980297,1279677,1648401,2106146, 2660304,3336122,4142715,5114735,6259510,7619959, 9210010] |