The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 2 |
| 2 | 4 |
| 3 | 8 |
| 4 | 16 |
| 5 | 30 |
| 6 | 56 |
| 7 | 105 |
| 8 | 197 |
| 9 | 369 |
| 10 | 694 |
| 11 | 1310 |
| 12 | 2478 |
| 13 | 4696 |
| 14 | 8916 |
| 15 | 16961 |
| 16 | 32330 |
| 17 | 61748 |
| 18 | 118158 |
| 19 | 226510 |
| 20 | 434977 |
| 21 | 836712 |
| 22 | 1612101 |
| 23 | 3110914 |
| 24 | 6012212 |
| 25 | 11635952 |
| 26 | 22550833 |
| 27 | 43761165 |
| 28 | 85026439 |
| 29 | 165398533 |
| 30 | 322104060 |
| 31 | 627946682 |
| 32 | 1225426998 |
| 33 | 2393686551 |
[1,2,4,8,16,30,56,105,197,369,694,1310,2478,4696, 8916,16961,32330,61748,118158,226510,434977, 836712,1612101,3110914,6012212,11635952,22550833, 43761165,85026439,165398533,322104060,627946682, 1225426998,2393686551] |