The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 1023 |
| 3 | 59050 |
| 4 | 1047551 |
| 5 | 9765626 |
| 6 | 60408150 |
| 7 | 282475250 |
| 8 | 1072692223 |
| 9 | 3486843451 |
| 10 | 9990235398 |
| 11 | 25937424602 |
| 12 | 61857886550 |
| 13 | 137858491850 |
| 14 | 288972180750 |
| 15 | 576660215300 |
| 16 | 1098436836351 |
| 17 | 2015993900450 |
| 18 | 3567040850373 |
| 19 | 6131066257802 |
| 20 | 10229991281926 |
| 21 | 16680163512500 |
| 22 | 26533985367846 |
| 23 | 41426511213650 |
| 24 | 63342475768150 |
[1,1023,59050,1047551,9765626,60408150,282475250, 1072692223,3486843451,9990235398,25937424602, 61857886550,137858491850,288972180750, 576660215300,1098436836351,2015993900450, 3567040850373,6131066257802,10229991281926, 16680163512500,26533985367846,41426511213650, 63342475768150] |