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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 1 |
| 2 | 21 |
| 3 | 3 |
| 4 | 45 |
| 5 | 15 |
| 6 | 6 |
| 7 | 78 |
| 8 | 28 |
| 9 | 91 |
| 10 | 10 |
| 11 | 1128 |
| 12 | 120 |
| 13 | 136 |
| 14 | 1431 |
| 15 | 15 |
| 16 | 1653 |
| 17 | 171 |
| 18 | 1830 |
| 19 | 190 |
| 20 | 120 |
| 21 | 21 |
| 22 | 1225 |
| 23 | 231 |
| 24 | 2415 |
| 25 | 253 |
| 26 | 1326 |
| 27 | 276 |
| 28 | 28 |
| 29 | 2926 |
| 30 | 300 |
| 31 | 231 |
| 32 | 325 |
| 33 | 3321 |
| 34 | 2346 |
| 35 | 351 |
| 36 | 36 |
| 37 | 378 |
| 38 | 3828 |
| 39 | 3916 |
| 40 | 406 |
| 41 | 741 |
| 42 | 4278 |
| 43 | 435 |
| 44 | 4465 |
| 45 | 45 |
| 46 | 465 |
| 47 | 4753 |
| 48 | 1485 |
| 49 | 496 |
| 50 | 2850 |
| 51 | 351 |
| 52 | 528 |
[0,1,21,3,45,15,6,78,28,91,10,1128,120,136,1431, 15,1653,171,1830,190,120,21,1225,231,2415,253, 1326,276,28,2926,300,231,325,3321,2346,351,36,378, 3828,3916,406,741,4278,435,4465,45,465,4753,1485, 496,2850,351,528] |