n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 4 |
3 | 8 |
4 | 20 |
5 | 57 |
6 | 160 |
7 | 422 |
8 | 1076 |
9 | 2780 |
10 | 7449 |
11 | 20462 |
12 | 56348 |
13 | 153909 |
14 | 418268 |
15 | 1139703 |
16 | 3126068 |
17 | 8618611 |
18 | 23801146 |
19 | 65708424 |
20 | 181391905 |
21 | 501296216 |
22 | 1387834518 |
23 | 3848187985 |
24 | 10680579812 |
25 | 29660831057 |
26 | 82415406493 |
27 | 229156296047 |
28 | 637659848888 |
29 | 1775648562970 |
30 | 4947475298595 |
[1,2,4,8,20,57,160,422,1076,2780,7449,20462,56348, 153909,418268,1139703,3126068,8618611,23801146, 65708424,181391905,501296216,1387834518, 3848187985,10680579812,29660831057,82415406493, 229156296047,637659848888,1775648562970, 4947475298595] |