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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 4 |
| 3 | 15 |
| 4 | 30 |
| 5 | 66 |
| 6 | 115 |
| 7 | 200 |
| 8 | 295 |
| 9 | 471 |
| 10 | 659 |
| 11 | 946 |
| 12 | 1259 |
| 13 | 1715 |
| 14 | 2194 |
| 15 | 2920 |
| 16 | 3591 |
| 17 | 4561 |
| 18 | 5585 |
| 19 | 6916 |
| 20 | 8216 |
| 21 | 10082 |
| 22 | 11823 |
| 23 | 14124 |
| 24 | 16389 |
| 25 | 19350 |
| 26 | 22174 |
| 27 | 26004 |
| 28 | 29435 |
| 29 | 33931 |
| 30 | 38445 |
| 31 | 43902 |
| 32 | 48925 |
| 33 | 55767 |
| 34 | 61941 |
| 35 | 69831 |
| 36 | 77275 |
| 37 | 86415 |
| 38 | 94968 |
| 39 | 106094 |
| 40 | 115874 |
| 41 | 128216 |
| 42 | 140214 |
| 43 | 154405 |
[1,4,15,30,66,115,200,295,471,659,946,1259,1715, 2194,2920,3591,4561,5585,6916,8216,10082,11823, 14124,16389,19350,22174,26004,29435,33931,38445, 43902,48925,55767,61941,69831,77275,86415,94968, 106094,115874,128216,140214,154405] |