The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 0 | 4140 |
| 1 | 21147 |
| 2 | 66491 |
| 3 | 168938 |
| 4 | 373832 |
| 5 | 752681 |
| 6 | 1413937 |
| 7 | 2516880 |
| 8 | 4288933 |
| 9 | 7051043 |
| 10 | 11247965 |
| 11 | 17485725 |
| 12 | 26581264 |
| 13 | 39621636 |
| 14 | 58039748 |
| 15 | 83708561 |
| 16 | 119053483 |
| 17 | 167190888 |
| 18 | 232099972 |
| 19 | 318825211 |
| 20 | 433724509 |
| 21 | 584768196 |
| 22 | 781893879 |
| 23 | 1037430804 |
| 24 | 1366607287 |
| 25 | 1788149627 |
[4140,21147,66491,168938,373832,752681,1413937, 2516880,4288933,7051043,11247965,17485725, 26581264,39621636,58039748,83708561,119053483, 167190888,232099972,318825211,433724509,584768196, 781893879,1037430804,1366607287,1788149627] |