The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 0 |
| 2 | 7 |
| 3 | 0 |
| 4 | 31 |
| 5 | 0 |
| 6 | 127 |
| 7 | 0 |
| 8 | 511 |
| 9 | 8 |
| 10 | 2039 |
| 11 | 8 |
| 12 | 8191 |
| 13 | 136 |
| 14 | 32639 |
| 15 | 200 |
| 16 | 130903 |
| 17 | 2504 |
| 18 | 522079 |
| 19 | 3160 |
| 20 | 2094879 |
| 21 | 40128 |
| 22 | 8353343 |
| 23 | 52680 |
| 24 | 33521247 |
| 25 | 641496 |
| 26 | 133651487 |
| 27 | 843752 |
| 28 | 536334383 |
| 29 | 10274720 |
| 30 | 2138406463 |
| 31 | 13418964 |
| 32 | 8581372959 |
| 33 | 163889616 |
| 34 | 34214895127 |
| 35 | 217432276 |
[1,0,7,0,31,0,127,0,511,8,2039,8,8191,136,32639, 200,130903,2504,522079,3160,2094879,40128,8353343, 52680,33521247,641496,133651487,843752,536334383, 10274720,2138406463,13418964,8581372959,163889616, 34214895127,217432276] |