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| n | a(n) |
|---|---|
| 1 | 2 |
| 2 | 3 |
| 3 | 5 |
| 4 | 8 |
| 5 | 16 |
| 6 | 38 |
| 7 | 101 |
| 8 | 284 |
| 9 | 852 |
| 10 | 2694 |
| 11 | 8935 |
| 12 | 30952 |
| 13 | 111598 |
| 14 | 417560 |
| 15 | 1617204 |
| 16 | 6468816 |
| 17 | 26671611 |
| 18 | 113158064 |
| 19 | 493244565 |
| 20 | 2205856753 |
| 21 | 10108505545 |
| 22 | 47413093714 |
| 23 | 227385209453 |
| 24 | 1113955476429 |
| 25 | 5569777382146 |
| 26 | 28400403557929 |
[2,3,5,8,16,38,101,284,852,2694,8935,30952,111598, 417560,1617204,6468816,26671611,113158064, 493244565,2205856753,10108505545,47413093714, 227385209453,1113955476429,5569777382146, 28400403557929] |