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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 4 |
| 2 | 12 |
| 3 | 32 |
| 4 | 76 |
| 5 | 168 |
| 6 | 352 |
| 7 | 704 |
| 8 | 1356 |
| 9 | 2532 |
| 10 | 4600 |
| 11 | 8160 |
| 12 | 14176 |
| 13 | 24168 |
| 14 | 40512 |
| 15 | 66880 |
| 16 | 108876 |
| 17 | 174984 |
| 18 | 277932 |
| 19 | 436640 |
| 20 | 679032 |
| 21 | 1046016 |
| 22 | 1597088 |
| 23 | 2418240 |
| 24 | 3632992 |
| 25 | 5417708 |
| 26 | 8022840 |
| 27 | 11802176 |
| 28 | 17252928 |
| 29 | 25070568 |
| 30 | 36223424 |
| 31 | 52053760 |
| 32 | 74414412 |
[1,4,12,32,76,168,352,704,1356,2532,4600,8160, 14176,24168,40512,66880,108876,174984,277932, 436640,679032,1046016,1597088,2418240,3632992, 5417708,8022840,11802176,17252928,25070568, 36223424,52053760,74414412] |