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| n | a(n) |
|---|---|
| 1 | 12 |
| 2 | 32 |
| 3 | 88 |
| 4 | 242 |
| 5 | 660 |
| 6 | 1800 |
| 7 | 4920 |
| 8 | 13448 |
| 9 | 36736 |
| 10 | 100352 |
| 11 | 274176 |
| 12 | 749088 |
| 13 | 2046528 |
| 14 | 5591168 |
| 15 | 15275392 |
| 16 | 41733248 |
| 17 | 114017280 |
| 18 | 311500800 |
| 19 | 851036160 |
| 20 | 2325074432 |
| 21 | 6352221184 |
| 22 | 17354590208 |
| 23 | 47413622784 |
| 24 | 129536428032 |
| 25 | 353900101632 |
[12,32,88,242,660,1800,4920,13448,36736,100352, 274176,749088,2046528,5591168,15275392,41733248, 114017280,311500800,851036160,2325074432, 6352221184,17354590208,47413622784,129536428032, 353900101632] |