n | a(n) |
---|---|
0 | 1 |
1 | 4 |
2 | 28 |
3 | 268 |
4 | 3004 |
5 | 36784 |
6 | 476476 |
7 | 6418192 |
8 | 88986172 |
9 | 1261473136 |
10 | 18200713168 |
11 | 266393373712 |
12 | 3945664966204 |
13 | 59029237351504 |
14 | 890697897694192 |
15 | 13539585443232688 |
16 | 207149418061499452 |
17 | 3187355160332835184 |
18 | 49290960047575223824 |
19 | 765703166164798253392 |
[1,4,28,268,3004,36784,476476,6418192,88986172, 1261473136,18200713168,266393373712,3945664966204, 59029237351504,890697897694192,13539585443232688, 207149418061499452,3187355160332835184, 49290960047575223824,765703166164798253392] |