n | a(n) |
---|---|
0 | 1 |
1 | 4 |
2 | 14 |
3 | 46 |
4 | 162 |
5 | 574 |
6 | 2042 |
7 | 7270 |
8 | 25890 |
9 | 92206 |
10 | 328394 |
11 | 1169590 |
12 | 4165554 |
13 | 14835838 |
14 | 52838618 |
15 | 188187526 |
16 | 670239810 |
17 | 2387094478 |
18 | 8501763050 |
19 | 30279478102 |
20 | 107841960402 |
21 | 384084837406 |
22 | 1367938433018 |
23 | 4871984973862 |
[1,4,14,46,162,574,2042,7270,25890,92206,328394, 1169590,4165554,14835838,52838618,188187526, 670239810,2387094478,8501763050,30279478102, 107841960402,384084837406,1367938433018, 4871984973862] |