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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 0 |
| 2 | 0 |
| 3 | 0 |
| 4 | 1 |
| 5 | 1 |
| 6 | 2 |
| 7 | 3 |
| 8 | 6 |
| 9 | 8 |
| 10 | 13 |
| 11 | 18 |
| 12 | 27 |
| 13 | 37 |
| 14 | 53 |
| 15 | 71 |
| 16 | 99 |
| 17 | 131 |
| 18 | 177 |
| 19 | 232 |
| 20 | 307 |
| 21 | 397 |
| 22 | 518 |
| 23 | 663 |
| 24 | 853 |
| 25 | 1082 |
| 26 | 1376 |
| 27 | 1730 |
| 28 | 2179 |
| 29 | 2719 |
| 30 | 3394 |
| 31 | 4206 |
| 32 | 5211 |
| 33 | 6415 |
| 34 | 7894 |
| 35 | 9661 |
| 36 | 11814 |
| 37 | 14381 |
| 38 | 17487 |
| 39 | 21179 |
| 40 | 25622 |
| 41 | 30887 |
| 42 | 37188 |
| 43 | 44637 |
| 44 | 53509 |
| 45 | 63965 |
| 46 | 76368 |
| 47 | 90946 |
| 48 | 108169 |
| 49 | 128361 |
[0,0,0,0,1,1,2,3,6,8,13,18,27,37,53,71,99,131,177, 232,307,397,518,663,853,1082,1376,1730,2179,2719, 3394,4206,5211,6415,7894,9661,11814,14381,17487, 21179,25622,30887,37188,44637,53509,63965,76368, 90946,108169,128361] |