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| n | a(n) |
|---|---|
| 1 | 3 |
| 2 | 2 |
| 3 | 5 |
| 4 | 12 |
| 5 | 19 |
| 6 | 47 |
| 7 | 101 |
| 8 | 206 |
| 9 | 411 |
| 10 | 882 |
| 11 | 1851 |
| 12 | 3845 |
| 13 | 7965 |
| 14 | 16694 |
| 15 | 34883 |
| 16 | 72716 |
| 17 | 151521 |
| 18 | 316419 |
| 19 | 660399 |
| 20 | 1377674 |
| 21 | 2873815 |
| 22 | 5997158 |
| 23 | 12513837 |
| 24 | 26109233 |
| 25 | 54474709 |
| 26 | 113665030 |
| 27 | 237165643 |
| 28 | 494844028 |
| 29 | 1032487175 |
| 30 | 2154302515 |
| 31 | 4494977409 |
[3,2,5,12,19,47,101,206,411,882,1851,3845,7965, 16694,34883,72716,151521,316419,660399,1377674, 2873815,5997158,12513837,26109233,54474709, 113665030,237165643,494844028,1032487175, 2154302515,4494977409] |