The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 1 |
| 2 | 5 |
| 3 | 15 |
| 4 | 35 |
| 5 | 71 |
| 6 | 132 |
| 7 | 231 |
| 8 | 386 |
| 9 | 622 |
| 10 | 974 |
| 11 | 1491 |
| 12 | 2241 |
| 13 | 3318 |
| 14 | 4852 |
| 15 | 7023 |
| 16 | 10080 |
| 17 | 14367 |
| 18 | 20359 |
| 19 | 28712 |
| 20 | 40332 |
| 21 | 56470 |
| 22 | 78853 |
| 23 | 109865 |
| 24 | 152797 |
| 25 | 212192 |
| 26 | 294321 |
| 27 | 407840 |
| 28 | 564697 |
| 29 | 781384 |
| 30 | 1080665 |
| 31 | 1493961 |
| 32 | 2064642 |
| 33 | 2852571 |
| 34 | 3940376 |
| 35 | 5442107 |
| 36 | 7515185 |
[0,1,5,15,35,71,132,231,386,622,974,1491,2241, 3318,4852,7023,10080,14367,20359,28712,40332, 56470,78853,109865,152797,212192,294321,407840, 564697,781384,1080665,1493961,2064642,2852571, 3940376,5442107,7515185] |