The OEIS is supported by the many generous donors to the OEIS Foundation.
A151308 as a simple table
| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 2 |
| 2 | 9 |
| 3 | 34 |
| 4 | 161 |
| 5 | 690 |
| 6 | 3340 |
| 7 | 15127 |
| 8 | 74025 |
| 9 | 345350 |
| 10 | 1700641 |
| 11 | 8078534 |
| 12 | 39940239 |
| 13 | 191998427 |
| 14 | 951780628 |
| 15 | 4613430423 |
| 16 | 22912945993 |
| 17 | 111732959607 |
| 18 | 555692292248 |
| 19 | 2722027662579 |
| 20 | 13551646056826 |
| 21 | 66612271878273 |
| 22 | 331891009874753 |
| 23 | 1635825684723348 |
| 24 | 8155387103254651 |
| 25 | 40283455920402930 |
| 26 | 200930087609072285 |
[1,2,9,34,161,690,3340,15127,74025,345350,1700641, 8078534,39940239,191998427,951780628,4613430423, 22912945993,111732959607,555692292248, 2722027662579,13551646056826,66612271878273, 331891009874753,1635825684723348,8155387103254651, 40283455920402930,200930087609072285] |