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| n | a(n) |
|---|---|
| 1 | 168 |
| 2 | 3588 |
| 3 | 20424 |
| 4 | 73860 |
| 5 | 189468 |
| 6 | 402216 |
| 7 | 782808 |
| 8 | 1385040 |
| 9 | 2214108 |
| 10 | 3423840 |
| 11 | 5196312 |
| 12 | 7218552 |
| 13 | 10353432 |
| 14 | 13823772 |
| 15 | 18047124 |
| 16 | 24083736 |
| 17 | 31051152 |
| 18 | 38334972 |
| 19 | 48877440 |
| 20 | 59201544 |
| 21 | 72052956 |
| 22 | 88004184 |
| 23 | 106601088 |
| 24 | 124009020 |
[168,3588,20424,73860,189468,402216,782808, 1385040,2214108,3423840,5196312,7218552,10353432, 13823772,18047124,24083736,31051152,38334972, 48877440,59201544,72052956,88004184,106601088, 124009020] |