| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 0 |
| 3 | 0 |
| 4 | 0 |
| 5 | 0 |
| 6 | 1 |
| 7 | 1 |
| 8 | 2 |
| 9 | 3 |
| 10 | 5 |
| 11 | 7 |
| 12 | 11 |
| 13 | 13 |
| 14 | 19 |
| 15 | 24 |
| 16 | 32 |
| 17 | 39 |
| 18 | 52 |
| 19 | 61 |
| 20 | 77 |
| 21 | 93 |
| 22 | 114 |
| 23 | 133 |
| 24 | 164 |
| 25 | 188 |
| 26 | 226 |
| 27 | 261 |
| 28 | 309 |
| 29 | 353 |
| 30 | 417 |
| 31 | 471 |
| 32 | 549 |
| 33 | 622 |
| 34 | 717 |
| 35 | 808 |
| 36 | 933 |
| 37 | 1042 |
| 38 | 1191 |
| 39 | 1334 |
| 40 | 1516 |
| 41 | 1690 |
| 42 | 1921 |
| 43 | 2131 |
| 44 | 2407 |
| 45 | 2674 |
| 46 | 3006 |
| 47 | 3330 |
| 48 | 3744 |
| 49 | 4135 |
| 50 | 4628 |
| 51 | 5116 |
| 52 | 5708 |
| 53 | 6294 |
| 54 | 7020 |
[0,0,0,0,0,1,1,2,3,5,7,11,13,19,24,32,39,52,61,77, 93,114,133,164,188,226,261,309,353,417,471,549, 622,717,808,933,1042,1191,1334,1516,1690,1921, 2131,2407,2674,3006,3330,3744,4135,4628,5116,5708, 6294,7020] |