n | a(n) |
---|---|
0 | 1 |
1 | 4 |
2 | 3 |
3 | 8 |
4 | 18 |
5 | 47 |
6 | 108 |
7 | 268 |
8 | 638 |
9 | 1553 |
10 | 3761 |
11 | 9189 |
12 | 22453 |
13 | 55185 |
14 | 135894 |
15 | 335906 |
16 | 832312 |
17 | 2068066 |
18 | 5149845 |
19 | 12852750 |
20 | 32138353 |
21 | 80509495 |
22 | 202013368 |
23 | 507669048 |
24 | 1277586867 |
25 | 3219366610 |
26 | 8122275225 |
[1,4,3,8,18,47,108,268,638,1553,3761,9189,22453, 55185,135894,335906,832312,2068066,5149845, 12852750,32138353,80509495,202013368,507669048, 1277586867,3219366610,8122275225] |