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| n | a(n) |
|---|---|
| 1 | 64 |
| 2 | 190 |
| 3 | 344 |
| 4 | 817 |
| 5 | 3321 |
| 6 | 16267 |
| 7 | 86487 |
| 8 | 476348 |
| 9 | 2647555 |
| 10 | 14797928 |
| 11 | 82863837 |
| 12 | 464502820 |
| 13 | 2605038853 |
| 14 | 14613251568 |
| 15 | 81984567828 |
| 16 | 459986291171 |
| 17 | 2580903334169 |
| 18 | 14481247495703 |
| 19 | 81253869292071 |
| 20 | 455915278972371 |
| 21 | 2558145839414926 |
[64,190,344,817,3321,16267,86487,476348,2647555, 14797928,82863837,464502820,2605038853, 14613251568,81984567828,459986291171, 2580903334169,14481247495703,81253869292071, 455915278972371,2558145839414926] |