The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 0 | 603 |
| 1 | 4731 |
| 2 | 58834 |
| 3 | 254204 |
| 4 | 1032696 |
| 5 | 4162544 |
| 6 | 16713696 |
| 7 | 66981824 |
| 8 | 268181376 |
| 9 | 1073233664 |
| 10 | 4293950976 |
| 11 | 17177836544 |
| 12 | 68715411456 |
| 13 | 274869776384 |
| 14 | 1099495366656 |
| 15 | 4398013988864 |
| 16 | 17592120999936 |
| 17 | 70368614088704 |
[603,4731,58834,254204,1032696,4162544,16713696, 66981824,268181376,1073233664,4293950976, 17177836544,68715411456,274869776384, 1099495366656,4398013988864,17592120999936, 70368614088704] |