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| n | a(n) |
|---|---|
| 10 | 1 |
| 11 | 0 |
| 12 | 0 |
| 13 | 0 |
| 14 | 0 |
| 15 | 0 |
| 16 | 0 |
| 17 | 0 |
| 18 | 0 |
| 19 | 9 |
| 20 | 19 |
| 21 | 20 |
| 22 | 21 |
| 23 | 22 |
| 24 | 23 |
| 25 | 24 |
| 26 | 25 |
| 27 | 26 |
| 28 | 144 |
| 29 | 406 |
| 30 | 841 |
| 31 | 1335 |
| 32 | 1891 |
| 33 | 2512 |
| 34 | 3201 |
| 35 | 3961 |
| 36 | 4795 |
| 37 | 7491 |
| 38 | 14467 |
| 39 | 28861 |
| 40 | 54626 |
| 41 | 94160 |
| 42 | 150101 |
| 43 | 225337 |
| 44 | 323016 |
| 45 | 446556 |
| 46 | 629454 |
| 47 | 949486 |
| 48 | 1545877 |
| 49 | 2639756 |
| 50 | 4558225 |
| 51 | 7716325 |
| 52 | 12629776 |
| 53 | 19928727 |
| 54 | 30372551 |
[1,0,0,0,0,0,0,0,0,9,19,20,21,22,23,24,25,26,144, 406,841,1335,1891,2512,3201,3961,4795,7491,14467, 28861,54626,94160,150101,225337,323016,446556, 629454,949486,1545877,2639756,4558225,7716325, 12629776,19928727,30372551] |