n | a(n) |
---|---|
0 | 1 |
1 | 13 |
2 | 91 |
3 | 455 |
4 | 1820 |
5 | 6188 |
6 | 18564 |
7 | 50388 |
8 | 125970 |
9 | 293930 |
10 | 646646 |
11 | 1352078 |
12 | 2704155 |
13 | 5200287 |
14 | 9657609 |
15 | 17383405 |
16 | 30419935 |
17 | 51889747 |
18 | 86474661 |
19 | 141070137 |
20 | 225666870 |
21 | 354523390 |
22 | 547707394 |
23 | 833099722 |
[1,13,91,455,1820,6188,18564,50388,125970,293930, 646646,1352078,2704155,5200287,9657609,17383405, 30419935,51889747,86474661,141070137,225666870, 354523390,547707394,833099722] |