n | a(n) |
---|---|
0 | 1 |
1 | 4 |
2 | 11 |
3 | 28 |
4 | 67 |
5 | 156 |
6 | 354 |
7 | 792 |
8 | 1747 |
9 | 3820 |
10 | 8278 |
11 | 17832 |
12 | 38174 |
13 | 81368 |
14 | 172644 |
15 | 365104 |
16 | 769411 |
17 | 1617228 |
18 | 3389838 |
19 | 7090440 |
20 | 14797546 |
21 | 30828424 |
22 | 64106716 |
23 | 133113168 |
24 | 275967022 |
25 | 571415416 |
26 | 1181585564 |
27 | 2440680592 |
28 | 5035637212 |
[1,4,11,28,67,156,354,792,1747,3820,8278,17832, 38174,81368,172644,365104,769411,1617228,3389838, 7090440,14797546,30828424,64106716,133113168, 275967022,571415416,1181585564,2440680592, 5035637212] |