| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 0 |
| 3 | 0 |
| 4 | 0 |
| 5 | 1 |
| 6 | 1 |
| 7 | 2 |
| 8 | 3 |
| 9 | 4 |
| 10 | 6 |
| 11 | 8 |
| 12 | 10 |
| 13 | 13 |
| 14 | 17 |
| 15 | 21 |
| 16 | 27 |
| 17 | 33 |
| 18 | 41 |
| 19 | 50 |
| 20 | 63 |
| 21 | 75 |
| 22 | 93 |
| 23 | 111 |
| 24 | 136 |
| 25 | 163 |
| 26 | 198 |
| 27 | 235 |
| 28 | 285 |
| 29 | 337 |
| 30 | 406 |
| 31 | 479 |
| 32 | 574 |
| 33 | 676 |
| 34 | 806 |
| 35 | 948 |
| 36 | 1124 |
| 37 | 1318 |
| 38 | 1557 |
| 39 | 1822 |
| 40 | 2147 |
| 41 | 2505 |
| 42 | 2940 |
| 43 | 3424 |
| 44 | 4006 |
| 45 | 4657 |
| 46 | 5431 |
| 47 | 6299 |
| 48 | 7329 |
| 49 | 8483 |
| 50 | 9843 |
| 51 | 11372 |
| 52 | 13163 |
| 53 | 15177 |
| 54 | 17527 |
| 55 | 20175 |
[0,0,0,0,1,1,2,3,4,6,8,10,13,17,21,27,33,41,50,63, 75,93,111,136,163,198,235,285,337,406,479,574,676, 806,948,1124,1318,1557,1822,2147,2505,2940,3424, 4006,4657,5431,6299,7329,8483,9843,11372,13163, 15177,17527,20175] |