The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 0 |
| 3 | 0 |
| 4 | 0 |
| 5 | 4 |
| 6 | 0 |
| 7 | 0 |
| 8 | 47 |
| 9 | 47 |
| 10 | 0 |
| 11 | 0 |
| 12 | 395 |
| 13 | 1541 |
| 14 | 395 |
| 15 | 0 |
| 16 | 0 |
| 17 | 3453 |
| 18 | 46669 |
| 19 | 46669 |
| 20 | 3453 |
| 21 | 0 |
| 22 | 0 |
| 23 | 30475 |
| 24 | 1443372 |
| 25 | 4917221 |
| 26 | 1443372 |
| 27 | 30475 |
| 28 | 0 |
| 29 | 0 |
| 30 | 268257 |
| 31 | 44653299 |
| 32 | 534794424 |
| 33 | 534794424 |
| 34 | 44653299 |
| 35 | 268257 |
| 36 | 0 |
| 37 | 0 |
| 38 | 2360984 |
| 39 | 1380961734 |
| 40 | 58169902939 |
[0,0,0,0,4,0,0,47,47,0,0,395,1541,395,0,0,3453, 46669,46669,3453,0,0,30475,1443372,4917221, 1443372,30475,0,0,268257,44653299,534794424, 534794424,44653299,268257,0,0,2360984,1380961734, 58169902939] |