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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 0 |
| 2 | 1 |
| 3 | 1 |
| 4 | 2 |
| 5 | 4 |
| 6 | 6 |
| 7 | 9 |
| 8 | 13 |
| 9 | 20 |
| 10 | 28 |
| 11 | 40 |
| 12 | 54 |
| 13 | 74 |
| 14 | 102 |
| 15 | 135 |
| 16 | 180 |
| 17 | 235 |
| 18 | 310 |
| 19 | 397 |
| 20 | 516 |
| 21 | 658 |
| 22 | 843 |
| 23 | 1066 |
| 24 | 1349 |
| 25 | 1687 |
| 26 | 2119 |
| 27 | 2634 |
| 28 | 3273 |
| 29 | 4045 |
| 30 | 4995 |
| 31 | 6128 |
| 32 | 7517 |
| 33 | 9171 |
| 34 | 11181 |
| 35 | 13579 |
| 36 | 16457 |
| 37 | 19884 |
| 38 | 23992 |
| 39 | 28859 |
| 40 | 34646 |
| 41 | 41506 |
| 42 | 49634 |
| 43 | 59211 |
| 44 | 70533 |
| 45 | 83836 |
| 46 | 99504 |
| 47 | 117867 |
[0,0,1,1,2,4,6,9,13,20,28,40,54,74,102,135,180, 235,310,397,516,658,843,1066,1349,1687,2119,2634, 3273,4045,4995,6128,7517,9171,11181,13579,16457, 19884,23992,28859,34646,41506,49634,59211,70533, 83836,99504,117867] |