The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 3 |
| 2 | 8 |
| 3 | 23 |
| 4 | 64 |
| 5 | 181 |
| 6 | 512 |
| 7 | 1448 |
| 8 | 4096 |
| 9 | 11585 |
| 10 | 32768 |
| 11 | 92682 |
| 12 | 262144 |
| 13 | 741455 |
| 14 | 2097152 |
| 15 | 5931642 |
| 16 | 16777216 |
| 17 | 47453133 |
| 18 | 134217728 |
| 19 | 379625062 |
| 20 | 1073741824 |
| 21 | 3037000500 |
| 22 | 8589934592 |
| 23 | 24296004000 |
| 24 | 68719476736 |
[1,3,8,23,64,181,512,1448,4096,11585,32768,92682, 262144,741455,2097152,5931642,16777216,47453133, 134217728,379625062,1073741824,3037000500, 8589934592,24296004000,68719476736] |