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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 1 |
| 3 | 2 |
| 4 | 3 |
| 5 | 5 |
| 6 | 9 |
| 7 | 15 |
| 8 | 28 |
| 9 | 50 |
| 10 | 93 |
| 11 | 169 |
| 12 | 321 |
| 13 | 591 |
| 14 | 1118 |
| 15 | 2098 |
| 16 | 3973 |
| 17 | 7501 |
| 18 | 14273 |
| 19 | 27103 |
| 20 | 51722 |
| 21 | 98710 |
| 22 | 188935 |
| 23 | 361937 |
| 24 | 694911 |
| 25 | 1335471 |
| 26 | 2570966 |
| 27 | 4954794 |
| 28 | 9562165 |
| 29 | 18473141 |
| 30 | 35730493 |
| 31 | 69176559 |
| 32 | 134067508 |
| 33 | 260062338 |
| 34 | 504918961 |
| 35 | 981117305 |
| 36 | 1907954345 |
[0,1,2,3,5,9,15,28,50,93,169,321,591,1118,2098, 3973,7501,14273,27103,51722,98710,188935,361937, 694911,1335471,2570966,4954794,9562165,18473141, 35730493,69176559,134067508,260062338,504918961, 981117305,1907954345] |