n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 6 |
3 | 16 |
4 | 54 |
5 | 169 |
6 | 602 |
7 | 1988 |
8 | 7290 |
9 | 25170 |
10 | 93811 |
11 | 330902 |
12 | 1249367 |
13 | 4499607 |
14 | 17116040 |
15 | 62347523 |
16 | 238894837 |
17 | 880763604 |
18 | 3388972673 |
19 | 12582449763 |
20 | 48639631649 |
21 | 182013638337 |
22 | 705478480829 |
23 | 2652531544952 |
24 | 10314218236630 |
25 | 38995799156417 |
26 | 151909821456349 |
27 | 576310438021719 |
28 | 2250333836996630 |
[1,2,6,16,54,169,602,1988,7290,25170,93811,330902, 1249367,4499607,17116040,62347523,238894837, 880763604,3388972673,12582449763,48639631649, 182013638337,705478480829,2652531544952, 10314218236630,38995799156417,151909821456349, 576310438021719,2250333836996630] |