n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 3 |
3 | 7 |
4 | 19 |
5 | 51 |
6 | 140 |
7 | 386 |
8 | 1071 |
9 | 2983 |
10 | 8338 |
11 | 23376 |
12 | 65715 |
13 | 185199 |
14 | 523134 |
15 | 1480872 |
16 | 4200411 |
17 | 11936619 |
18 | 33981063 |
19 | 96897759 |
20 | 276739029 |
21 | 791532973 |
22 | 2267119660 |
23 | 6502108902 |
24 | 18671460905 |
25 | 53680763201 |
26 | 154507444731 |
27 | 445190930863 |
28 | 1284064525987 |
[1,1,3,7,19,51,140,386,1071,2983,8338,23376,65715, 185199,523134,1480872,4200411,11936619,33981063, 96897759,276739029,791532973,2267119660, 6502108902,18671460905,53680763201,154507444731, 445190930863,1284064525987] |