n | a(n) |
---|---|
0 | 1 |
1 | 3 |
2 | 12 |
3 | 55 |
4 | 272 |
5 | 1413 |
6 | 7599 |
7 | 41933 |
8 | 236053 |
9 | 1350093 |
10 | 7822620 |
11 | 45817390 |
12 | 270815730 |
13 | 1613300978 |
14 | 9676131942 |
15 | 58380176644 |
16 | 354081959367 |
17 | 2157570900137 |
18 | 13201923181308 |
19 | 81084900544971 |
20 | 499711105642851 |
21 | 3089163236655363 |
22 | 19150916212748940 |
23 | 119031956868317285 |
[1,3,12,55,272,1413,7599,41933,236053,1350093, 7822620,45817390,270815730,1613300978,9676131942, 58380176644,354081959367,2157570900137, 13201923181308,81084900544971,499711105642851, 3089163236655363,19150916212748940, 119031956868317285] |