The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 1 | 144 |
| 2 | 927 |
| 3 | 2872 |
| 4 | 6930 |
| 5 | 15109 |
| 6 | 31489 |
| 7 | 64256 |
| 8 | 129792 |
| 9 | 260864 |
| 10 | 523008 |
| 11 | 1047296 |
| 12 | 2095872 |
| 13 | 4193024 |
| 14 | 8387328 |
| 15 | 16775936 |
| 16 | 33553152 |
| 17 | 67107584 |
| 18 | 134216448 |
| 19 | 268434176 |
| 20 | 536869632 |
| 21 | 1073740544 |
| 22 | 2147482368 |
| 23 | 4294966016 |
| 24 | 8589933312 |
| 25 | 17179867904 |
[144,927,2872,6930,15109,31489,64256,129792, 260864,523008,1047296,2095872,4193024,8387328, 16775936,33553152,67107584,134216448,268434176, 536869632,1073740544,2147482368,4294966016, 8589933312,17179867904] |