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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 0 |
| 3 | 0 |
| 4 | 1 |
| 5 | 2 |
| 6 | 3 |
| 7 | 7 |
| 8 | 11 |
| 9 | 27 |
| 10 | 40 |
| 11 | 80 |
| 12 | 130 |
| 13 | 343 |
| 14 | 482 |
| 15 | 1180 |
| 16 | 1756 |
| 17 | 4473 |
| 18 | 6479 |
| 19 | 15387 |
| 20 | 24022 |
| 21 | 58714 |
| 22 | 89306 |
| 23 | 213397 |
| 24 | 335115 |
| 25 | 802311 |
| 26 | 1265350 |
| 27 | 2965114 |
| 28 | 4781514 |
| 29 | 11185644 |
| 30 | 18079040 |
| 31 | 42048314 |
| 32 | 68709969 |
| 33 | 159433693 |
| 34 | 262002130 |
| 35 | 602733406 |
| 36 | 1000343760 |
| 37 | 2297551889 |
| 38 | 3828253857 |
| 39 | 8748722270 |
| 40 | 14683465908 |
[0,0,0,1,2,3,7,11,27,40,80,130,343,482,1180,1756, 4473,6479,15387,24022,58714,89306,213397,335115, 802311,1265350,2965114,4781514,11185644,18079040, 42048314,68709969,159433693,262002130,602733406, 1000343760,2297551889,3828253857,8748722270, 14683465908] |