n | a(n) |
---|---|
0 | 1 |
1 | 4 |
2 | 18 |
3 | 76 |
4 | 312 |
5 | 1264 |
6 | 5088 |
7 | 20416 |
8 | 81792 |
9 | 327424 |
10 | 1310208 |
11 | 5241856 |
12 | 20969472 |
13 | 83881984 |
14 | 335536128 |
15 | 1342160896 |
16 | 5368676352 |
17 | 21474770944 |
18 | 85899214848 |
19 | 343597121536 |
20 | 1374389010432 |
21 | 5497557090304 |
22 | 21990230458368 |
23 | 87960926027776 |
[1,4,18,76,312,1264,5088,20416,81792,327424, 1310208,5241856,20969472,83881984,335536128, 1342160896,5368676352,21474770944,85899214848, 343597121536,1374389010432,5497557090304, 21990230458368,87960926027776] |