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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 0 |
| 3 | 3 |
| 4 | 1 |
| 5 | 5 |
| 6 | 8 |
| 7 | 7 |
| 8 | 25 |
| 9 | 25 |
| 10 | 58 |
| 11 | 95 |
| 12 | 155 |
| 13 | 299 |
| 14 | 494 |
| 15 | 905 |
| 16 | 1623 |
| 17 | 2867 |
| 18 | 5260 |
| 19 | 9421 |
| 20 | 17149 |
| 21 | 31225 |
| 22 | 56740 |
| 23 | 103795 |
| 24 | 189417 |
| 25 | 346621 |
| 26 | 634790 |
| 27 | 1162643 |
| 28 | 2132211 |
| 29 | 3910471 |
| 30 | 7175862 |
| 31 | 13172677 |
| 32 | 24185043 |
| 33 | 44417767 |
| 34 | 81586900 |
| 35 | 149883961 |
| 36 | 275388205 |
| 37 | 506024365 |
[1,0,3,1,5,8,7,25,25,58,95,155,299,494,905,1623, 2867,5260,9421,17149,31225,56740,103795,189417, 346621,634790,1162643,2132211,3910471,7175862, 13172677,24185043,44417767,81586900,149883961, 275388205,506024365] |