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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 0 |
| 3 | 0 |
| 4 | 1 |
| 5 | 1 |
| 6 | 5 |
| 7 | 4 |
| 8 | 18 |
| 9 | 19 |
| 10 | 73 |
| 11 | 73 |
| 12 | 278 |
| 13 | 283 |
| 14 | 1076 |
| 15 | 1090 |
| 16 | 4125 |
| 17 | 4183 |
| 18 | 15939 |
| 19 | 16105 |
| 20 | 61628 |
| 21 | 62170 |
| 22 | 239388 |
| 23 | 240907 |
| 24 | 932230 |
| 25 | 936447 |
| 26 | 3641945 |
| 27 | 3651618 |
| 28 | 14262540 |
| 29 | 14277519 |
| 30 | 55987858 |
| 31 | 55961118 |
| 32 | 220223982 |
| 33 | 219813564 |
| 34 | 867835023 |
| 35 | 865091976 |
| 36 | 3425442681 |
[0,0,0,1,1,5,4,18,19,73,73,278,283,1076,1090,4125, 4183,15939,16105,61628,62170,239388,240907,932230, 936447,3641945,3651618,14262540,14277519,55987858, 55961118,220223982,219813564,867835023,865091976, 3425442681] |