The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 0 |
| 2 | 0 |
| 3 | 0 |
| 4 | 0 |
| 5 | 0 |
| 6 | 1 |
| 7 | 0 |
| 8 | 1 |
| 9 | 2 |
| 10 | 4 |
| 11 | 8 |
| 12 | 16 |
| 13 | 32 |
| 14 | 64 |
| 15 | 127 |
| 16 | 254 |
| 17 | 507 |
| 18 | 1012 |
| 19 | 2020 |
| 20 | 4032 |
| 21 | 8048 |
| 22 | 16064 |
| 23 | 32064 |
| 24 | 64001 |
| 25 | 127748 |
| 26 | 254989 |
| 27 | 508966 |
| 28 | 1015912 |
| 29 | 2027792 |
| 30 | 4047536 |
| 31 | 8079008 |
| 32 | 16125952 |
| 33 | 32187903 |
| 34 | 64248058 |
| 35 | 128241127 |
| 36 | 255973288 |
| 37 | 510930664 |
| 38 | 1019833536 |
| 39 | 2035619536 |
[0,0,0,0,0,0,1,0,1,2,4,8,16,32,64,127,254,507, 1012,2020,4032,8048,16064,32064,64001,127748, 254989,508966,1015912,2027792,4047536,8079008, 16125952,32187903,64248058,128241127,255973288, 510930664,1019833536,2035619536] |