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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 0 |
| 3 | 0 |
| 4 | 0 |
| 5 | 0 |
| 6 | 0 |
| 7 | 0 |
| 8 | 0 |
| 9 | 1 |
| 10 | 0 |
| 11 | 1 |
| 12 | 1 |
| 13 | 2 |
| 14 | 2 |
| 15 | 4 |
| 16 | 4 |
| 17 | 7 |
| 18 | 9 |
| 19 | 12 |
| 20 | 15 |
| 21 | 22 |
| 22 | 26 |
| 23 | 36 |
| 24 | 45 |
| 25 | 59 |
| 26 | 73 |
| 27 | 97 |
| 28 | 117 |
| 29 | 152 |
| 30 | 187 |
| 31 | 236 |
| 32 | 289 |
| 33 | 365 |
| 34 | 442 |
| 35 | 551 |
| 36 | 671 |
| 37 | 825 |
| 38 | 999 |
| 39 | 1226 |
| 40 | 1474 |
| 41 | 1796 |
| 42 | 2159 |
| 43 | 2609 |
| 44 | 3124 |
| 45 | 3765 |
| 46 | 4485 |
| 47 | 5377 |
| 48 | 6396 |
| 49 | 7627 |
| 50 | 9041 |
| 51 | 10750 |
| 52 | 12696 |
| 53 | 15038 |
| 54 | 17724 |
| 55 | 20909 |
[0,0,0,0,0,0,0,0,1,0,1,1,2,2,4,4,7,9,12,15,22,26, 36,45,59,73,97,117,152,187,236,289,365,442,551, 671,825,999,1226,1474,1796,2159,2609,3124,3765, 4485,5377,6396,7627,9041,10750,12696,15038,17724, 20909] |