n | a(n) |
---|---|
1 | 1 |
2 | 3 |
3 | 12 |
4 | 62 |
5 | 370 |
6 | 2397 |
7 | 16345 |
8 | 115376 |
9 | 834786 |
10 | 6152285 |
11 | 45990120 |
12 | 347673108 |
13 | 2652283517 |
14 | 20385035972 |
15 | 157656007680 |
16 | 1225743120520 |
17 | 9572972899946 |
18 | 75056029550721 |
19 | 590469939950716 |
20 | 4659115833115680 |
21 | 36859770507695688 |
[1,3,12,62,370,2397,16345,115376,834786,6152285, 45990120,347673108,2652283517,20385035972, 157656007680,1225743120520,9572972899946, 75056029550721,590469939950716,4659115833115680, 36859770507695688] |