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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 4 |
| 3 | 8 |
| 4 | 18 |
| 5 | 30 |
| 6 | 55 |
| 7 | 85 |
| 8 | 141 |
| 9 | 211 |
| 10 | 324 |
| 11 | 467 |
| 12 | 691 |
| 13 | 968 |
| 14 | 1377 |
| 15 | 1898 |
| 16 | 2631 |
| 17 | 3554 |
| 18 | 4830 |
| 19 | 6425 |
| 20 | 8578 |
| 21 | 11272 |
| 22 | 14819 |
| 23 | 19243 |
| 24 | 25005 |
| 25 | 32133 |
| 26 | 41279 |
| 27 | 52585 |
| 28 | 66907 |
| 29 | 84512 |
| 30 | 106636 |
| 31 | 133685 |
| 32 | 167377 |
| 33 | 208439 |
| 34 | 259145 |
| 35 | 320696 |
| 36 | 396251 |
| 37 | 487532 |
| 38 | 598881 |
| 39 | 732990 |
| 40 | 895627 |
| 41 | 1090752 |
[1,4,8,18,30,55,85,141,211,324,467,691,968,1377, 1898,2631,3554,4830,6425,8578,11272,14819,19243, 25005,32133,41279,52585,66907,84512,106636,133685, 167377,208439,259145,320696,396251,487532,598881, 732990,895627,1090752] |