n | a(n) |
---|---|
1 | 3 |
2 | 3 |
3 | 6 |
4 | 16 |
5 | 46 |
6 | 142 |
7 | 461 |
8 | 1542 |
9 | 5278 |
10 | 18417 |
11 | 65218 |
12 | 233816 |
13 | 846938 |
14 | 3094943 |
15 | 11395715 |
16 | 42237936 |
17 | 157465847 |
18 | 590075550 |
19 | 2221391912 |
20 | 8397223487 |
21 | 31861406058 |
22 | 121300625969 |
23 | 463233477550 |
24 | 1774034788166 |
25 | 6811612470692 |
26 | 26216538077715 |
27 | 101125406981562 |
[3,3,6,16,46,142,461,1542,5278,18417,65218,233816, 846938,3094943,11395715,42237936,157465847, 590075550,2221391912,8397223487,31861406058, 121300625969,463233477550,1774034788166, 6811612470692,26216538077715,101125406981562] |