The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 0 |
| 2 | 0 |
| 3 | 2 |
| 4 | 6 |
| 5 | 16 |
| 6 | 44 |
| 7 | 90 |
| 8 | 266 |
| 9 | 508 |
| 10 | 966 |
| 11 | 1824 |
| 12 | 3548 |
| 13 | 6094 |
| 14 | 11586 |
| 15 | 19254 |
| 16 | 37492 |
| 17 | 61876 |
| 18 | 103110 |
| 19 | 170932 |
| 20 | 286916 |
| 21 | 456554 |
| 22 | 759962 |
| 23 | 1190034 |
| 24 | 1887766 |
| 25 | 2937820 |
| 26 | 4608084 |
| 27 | 7004646 |
| 28 | 10938762 |
| 29 | 16372732 |
| 30 | 24851432 |
| 31 | 37014368 |
| 32 | 56368810 |
| 33 | 82688102 |
| 34 | 122855526 |
| 35 | 179808396 |
| 36 | 263406424 |
[0,0,0,2,6,16,44,90,266,508,966,1824,3548,6094, 11586,19254,37492,61876,103110,170932,286916, 456554,759962,1190034,1887766,2937820,4608084, 7004646,10938762,16372732,24851432,37014368, 56368810,82688102,122855526,179808396,263406424] |