n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 4 |
3 | 19 |
4 | 92 |
5 | 421 |
6 | 1830 |
7 | 7687 |
8 | 31624 |
9 | 128521 |
10 | 518666 |
11 | 2084875 |
12 | 8361996 |
13 | 33497101 |
14 | 134094862 |
15 | 536608783 |
16 | 2146926608 |
17 | 8588754961 |
18 | 34357248018 |
19 | 137433710611 |
20 | 549744803860 |
21 | 2199000186901 |
22 | 8796044787734 |
23 | 35184271425559 |
24 | 140737278640152 |
25 | 562949517213721 |
[1,1,4,19,92,421,1830,7687,31624,128521,518666, 2084875,8361996,33497101,134094862,536608783, 2146926608,8588754961,34357248018,137433710611, 549744803860,2199000186901,8796044787734, 35184271425559,140737278640152,562949517213721] |