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| n | a(n) |
|---|---|
| 1 | 2 |
| 2 | 13 |
| 3 | 0 |
| 4 | 47 |
| 5 | 911 |
| 6 | 1213 |
| 7 | 2417 |
| 8 | 1619 |
| 9 | 1723 |
| 10 | 2729 |
| 11 | 2131 |
| 12 | 3137 |
| 13 | 4241 |
| 14 | 4643 |
| 15 | 3947 |
| 16 | 4153 |
[2,13,0,47,911,1213,2417,1619,1723,2729,2131,3137, 4241,4643,3947,4153] |