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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 0 |
| 2 | 4 |
| 3 | 1 |
| 4 | 8 |
| 5 | 4 |
| 6 | 15 |
| 7 | 8 |
| 8 | 25 |
| 9 | 15 |
| 10 | 38 |
| 11 | 25 |
| 12 | 55 |
| 13 | 38 |
| 14 | 77 |
| 15 | 55 |
| 16 | 103 |
| 17 | 77 |
| 18 | 135 |
| 19 | 103 |
| 20 | 173 |
| 21 | 135 |
| 22 | 217 |
| 23 | 173 |
| 24 | 268 |
| 25 | 217 |
| 26 | 327 |
| 27 | 268 |
| 28 | 393 |
| 29 | 327 |
| 30 | 468 |
| 31 | 393 |
| 32 | 552 |
| 33 | 468 |
| 34 | 645 |
| 35 | 552 |
| 36 | 748 |
| 37 | 645 |
| 38 | 862 |
| 39 | 748 |
| 40 | 986 |
| 41 | 862 |
| 42 | 1122 |
| 43 | 986 |
| 44 | 1270 |
| 45 | 1122 |
| 46 | 1430 |
| 47 | 1270 |
| 48 | 1603 |
| 49 | 1430 |
| 50 | 1790 |
| 51 | 1603 |
| 52 | 1990 |
| 53 | 1790 |
[1,0,4,1,8,4,15,8,25,15,38,25,55,38,77,55,103,77, 135,103,173,135,217,173,268,217,327,268,393,327, 468,393,552,468,645,552,748,645,862,748,986,862, 1122,986,1270,1122,1430,1270,1603,1430,1790,1603, 1990,1790] |