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| n | a(n) |
|---|---|
| 0 | 5 |
| 1 | 60 |
| 2 | 376 |
| 3 | 1660 |
| 4 | 5830 |
| 5 | 17380 |
| 6 | 45760 |
| 7 | 109252 |
| 8 | 240955 |
| 9 | 497640 |
| 10 | 972400 |
| 11 | 1812200 |
| 12 | 3241628 |
| 13 | 5594360 |
| 14 | 9354080 |
| 15 | 15206840 |
| 16 | 24107105 |
| 17 | 37360004 |
| 18 | 56722600 |
| 19 | 84527300 |
| 20 | 123830850 |
| 21 | 178592700 |
| 22 | 253886880 |
| 23 | 356151900 |
[5,60,376,1660,5830,17380,45760,109252,240955, 497640,972400,1812200,3241628,5594360,9354080, 15206840,24107105,37360004,56722600,84527300, 123830850,178592700,253886880,356151900] |