n | a(n) |
---|---|
0 | 0 |
1 | 1 |
2 | 6 |
3 | 21 |
4 | 60 |
5 | 155 |
6 | 378 |
7 | 889 |
8 | 2040 |
9 | 4599 |
10 | 10230 |
11 | 22517 |
12 | 49140 |
13 | 106483 |
14 | 229362 |
15 | 491505 |
16 | 1048560 |
17 | 2228207 |
18 | 4718574 |
19 | 9961453 |
20 | 20971500 |
21 | 44040171 |
22 | 92274666 |
23 | 192937961 |
24 | 402653160 |
25 | 838860775 |
26 | 1744830438 |
27 | 3623878629 |
28 | 7516192740 |
29 | 15569256419 |
30 | 32212254690 |
[0,1,6,21,60,155,378,889,2040,4599,10230,22517, 49140,106483,229362,491505,1048560,2228207, 4718574,9961453,20971500,44040171,92274666, 192937961,402653160,838860775,1744830438, 3623878629,7516192740,15569256419,32212254690] |