n | a(n) |
---|---|
0 | 0 |
1 | 2 |
2 | 12 |
3 | 50 |
4 | 204 |
5 | 818 |
6 | 3276 |
7 | 13106 |
8 | 52428 |
9 | 209714 |
10 | 838860 |
11 | 3355442 |
12 | 13421772 |
13 | 53687090 |
14 | 214748364 |
15 | 858993458 |
16 | 3435973836 |
17 | 13743895346 |
18 | 54975581388 |
19 | 219902325554 |
20 | 879609302220 |
21 | 3518437208882 |
22 | 14073748835532 |
23 | 56294995342130 |
24 | 225179981368524 |
25 | 900719925474098 |
[0,2,12,50,204,818,3276,13106,52428,209714,838860, 3355442,13421772,53687090,214748364,858993458, 3435973836,13743895346,54975581388,219902325554, 879609302220,3518437208882,14073748835532, 56294995342130,225179981368524,900719925474098] |