n | a(n) |
---|---|
0 | 1 |
1 | 7 |
2 | 42 |
3 | 210 |
4 | 966 |
5 | 4158 |
6 | 17094 |
7 | 67782 |
8 | 261261 |
9 | 983983 |
10 | 3635632 |
11 | 13217568 |
12 | 47393892 |
13 | 167919948 |
14 | 588772152 |
15 | 2045481480 |
16 | 7048466271 |
17 | 24111291897 |
18 | 81939285582 |
19 | 276810647190 |
20 | 930096277110 |
21 | 3109797881190 |
22 | 10350813392010 |
23 | 34309326304890 |
24 | 113288127469335 |
[1,7,42,210,966,4158,17094,67782,261261,983983, 3635632,13217568,47393892,167919948,588772152, 2045481480,7048466271,24111291897,81939285582, 276810647190,930096277110,3109797881190, 10350813392010,34309326304890,113288127469335] |