The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 0 |
| 2 | 0 |
| 3 | 1 |
| 4 | 1 |
| 5 | 6 |
| 6 | 17 |
| 7 | 42 |
| 8 | 67 |
| 9 | 175 |
| 10 | 400 |
| 11 | 870 |
| 12 | 1841 |
| 13 | 3820 |
| 14 | 7837 |
| 15 | 15920 |
| 16 | 30997 |
| 17 | 63370 |
| 18 | 128348 |
| 19 | 258699 |
| 20 | 520042 |
| 21 | 1043284 |
| 22 | 2090732 |
| 23 | 4186382 |
| 24 | 8379022 |
| 25 | 16765549 |
| 26 | 33540664 |
| 27 | 67092258 |
| 28 | 134198633 |
| 29 | 268412631 |
| 30 | 536844414 |
| 31 | 1073710403 |
| 32 | 2147296425 |
| 33 | 4294753612 |
| 34 | 8589686922 |
| 35 | 17179580003 |
[0,0,0,1,1,6,17,42,67,175,400,870,1841,3820,7837, 15920,30997,63370,128348,258699,520042,1043284, 2090732,4186382,8379022,16765549,33540664, 67092258,134198633,268412631,536844414,1073710403, 2147296425,4294753612,8589686922,17179580003] |