n | a(n) |
---|---|
1 | 2 |
2 | 2 |
3 | 6 |
4 | 22 |
5 | 58 |
6 | 146 |
7 | 414 |
8 | 1206 |
9 | 3410 |
10 | 9634 |
11 | 27670 |
12 | 79926 |
13 | 230666 |
14 | 667058 |
15 | 1936174 |
16 | 5632662 |
17 | 16408866 |
18 | 47875650 |
19 | 139908774 |
20 | 409404630 |
21 | 1199368026 |
22 | 3517351890 |
23 | 10325547582 |
24 | 30339113718 |
25 | 89217594738 |
26 | 262561101282 |
27 | 773248631222 |
28 | 2278737199606 |
[2,2,6,22,58,146,414,1206,3410,9634,27670,79926, 230666,667058,1936174,5632662,16408866,47875650, 139908774,409404630,1199368026,3517351890, 10325547582,30339113718,89217594738,262561101282, 773248631222,2278737199606] |