The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 1 | 2 |
| 2 | 5 |
| 3 | 22 |
| 4 | 90 |
| 5 | 5792 |
| 6 | 46340 |
| 7 | 92681 |
| 8 | 185363 |
| 9 | 370727 |
| 10 | 2965820 |
| 11 | 5931641 |
| 12 | 47453132 |
| 13 | 94906265 |
| 14 | 759250124 |
| 15 | 1518500249 |
| 16 | 3037000499 |
| 17 | 6074000999 |
| 18 | 12148001999 |
| 19 | 24296003999 |
| 20 | 48592007999 |
| 21 | 388736063996 |
| 22 | 777472127993 |
| 23 | 1554944255987 |
| 24 | 6219777023950 |
[2,5,22,90,5792,46340,92681,185363,370727,2965820, 5931641,47453132,94906265,759250124,1518500249, 3037000499,6074000999,12148001999,24296003999, 48592007999,388736063996,777472127993, 1554944255987,6219777023950] |