n | a(n) |
---|---|
1 | 0 |
2 | 2 |
3 | 7 |
4 | 29 |
5 | 117 |
6 | 474 |
7 | 1919 |
8 | 7770 |
9 | 31460 |
10 | 127379 |
11 | 515747 |
12 | 2088217 |
13 | 8455018 |
14 | 34233669 |
15 | 138609296 |
16 | 561217582 |
17 | 2272323599 |
18 | 9200450421 |
19 | 37251863241 |
20 | 150829715006 |
21 | 610697048403 |
22 | 2472661868474 |
23 | 10011603514040 |
24 | 40536155064419 |
[0,2,7,29,117,474,1919,7770,31460,127379,515747, 2088217,8455018,34233669,138609296,561217582, 2272323599,9200450421,37251863241,150829715006, 610697048403,2472661868474,10011603514040, 40536155064419] |