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| n | a(n) |
|---|---|
| 1 | 4 |
| 2 | 15 |
| 3 | 48 |
| 4 | 125 |
| 5 | 284 |
| 6 | 582 |
| 7 | 1097 |
| 8 | 1932 |
| 9 | 3219 |
| 10 | 5123 |
| 11 | 7846 |
| 12 | 11631 |
| 13 | 16766 |
| 14 | 23588 |
| 15 | 32487 |
| 16 | 43910 |
| 17 | 58365 |
| 18 | 76425 |
| 19 | 98732 |
| 20 | 126001 |
| 21 | 159024 |
| 22 | 198674 |
| 23 | 245909 |
| 24 | 301776 |
| 25 | 367415 |
| 26 | 444063 |
| 27 | 533058 |
| 28 | 635843 |
| 29 | 753970 |
| 30 | 889104 |
| 31 | 1043027 |
| 32 | 1217642 |
| 33 | 1414977 |
| 34 | 1637189 |
[4,15,48,125,284,582,1097,1932,3219,5123,7846, 11631,16766,23588,32487,43910,58365,76425,98732, 126001,159024,198674,245909,301776,367415,444063, 533058,635843,753970,889104,1043027,1217642, 1414977,1637189] |