The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 1 |
| 2 | 2 |
| 3 | 3 |
| 4 | 5 |
| 5 | 9 |
| 6 | 16 |
| 7 | 28 |
| 8 | 49 |
| 9 | 86 |
| 10 | 151 |
| 11 | 265 |
| 12 | 465 |
| 13 | 816 |
| 14 | 1432 |
| 15 | 2513 |
| 16 | 4410 |
| 17 | 7739 |
| 18 | 13581 |
| 19 | 23833 |
| 20 | 41824 |
| 21 | 73396 |
| 22 | 128801 |
| 23 | 226030 |
| 24 | 396655 |
| 25 | 696081 |
| 26 | 1221537 |
| 27 | 2143648 |
| 28 | 3761840 |
| 29 | 6601569 |
| 30 | 11584946 |
| 31 | 20330163 |
| 32 | 35676949 |
| 33 | 62608681 |
| 34 | 109870576 |
| 35 | 192809420 |
| 36 | 338356945 |
| 37 | 593775046 |
[0,1,2,3,5,9,16,28,49,86,151,265,465,816,1432, 2513,4410,7739,13581,23833,41824,73396,128801, 226030,396655,696081,1221537,2143648,3761840, 6601569,11584946,20330163,35676949,62608681, 109870576,192809420,338356945,593775046] |