The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 1 | 64 |
| 2 | 301 |
| 3 | 115 |
| 4 | 448 |
| 5 | 1112 |
| 6 | 1852 |
| 7 | 4929 |
| 8 | 11412 |
| 9 | 24191 |
| 10 | 59037 |
| 11 | 137098 |
| 12 | 312216 |
| 13 | 728670 |
| 14 | 1685304 |
| 15 | 3910660 |
| 16 | 9066080 |
| 17 | 21026361 |
| 18 | 48798033 |
| 19 | 113138469 |
| 20 | 262500850 |
| 21 | 609384725 |
| 22 | 1413457638 |
| 23 | 3280851818 |
| 24 | 7614781353 |
| 25 | 17670627214 |
| 26 | 41015215732 |
| 27 | 95198485725 |
[64,301,115,448,1112,1852,4929,11412,24191,59037, 137098,312216,728670,1685304,3910660,9066080, 21026361,48798033,113138469,262500850,609384725, 1413457638,3280851818,7614781353,17670627214, 41015215732,95198485725] |