n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 4 |
3 | 11 |
4 | 48 |
5 | 157 |
6 | 707 |
7 | 2547 |
8 | 11728 |
9 | 44793 |
10 | 209515 |
11 | 830425 |
12 | 3928512 |
13 | 15975975 |
14 | 76204982 |
15 | 315911451 |
16 | 1516208552 |
17 | 6380856199 |
18 | 30770097293 |
19 | 131072626339 |
20 | 634440420834 |
21 | 2729589294471 |
22 | 13252591412098 |
23 | 57494028166843 |
24 | 279850008278954 |
25 | 1222697025739077 |
26 | 5964136075927073 |
27 | 26217164510751277 |
[1,1,4,11,48,157,707,2547,11728,44793,209515, 830425,3928512,15975975,76204982,315911451, 1516208552,6380856199,30770097293,131072626339, 634440420834,2729589294471,13252591412098, 57494028166843,279850008278954,1222697025739077, 5964136075927073,26217164510751277] |