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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 0 |
| 3 | 0 |
| 4 | 0 |
| 5 | 2 |
| 6 | 0 |
| 7 | 4 |
| 8 | 2 |
| 9 | 6 |
| 10 | 6 |
| 11 | 12 |
| 12 | 10 |
| 13 | 26 |
| 14 | 24 |
| 15 | 56 |
| 16 | 50 |
| 17 | 116 |
| 18 | 106 |
| 19 | 236 |
| 20 | 230 |
| 21 | 486 |
| 22 | 472 |
| 23 | 1010 |
| 24 | 960 |
| 25 | 2054 |
| 26 | 2004 |
| 27 | 4136 |
| 28 | 4086 |
| 29 | 8434 |
| 30 | 8254 |
| 31 | 17018 |
| 32 | 16828 |
| 33 | 34184 |
| 34 | 33992 |
| 35 | 69056 |
| 36 | 68314 |
| 37 | 138754 |
| 38 | 138020 |
| 39 | 278174 |
| 40 | 277452 |
| 41 | 559152 |
| 42 | 556246 |
| 43 | 1121116 |
| 44 | 1118170 |
| 45 | 2245076 |
| 46 | 2242058 |
| 47 | 4501566 |
| 48 | 4489798 |
[0,0,0,0,2,0,4,2,6,6,12,10,26,24,56,50,116,106, 236,230,486,472,1010,960,2054,2004,4136,4086,8434, 8254,17018,16828,34184,33992,69056,68314,138754, 138020,278174,277452,559152,556246,1121116, 1118170,2245076,2242058,4501566,4489798] |