n | a(n) |
---|---|
0 | 2 |
1 | 7 |
2 | 22 |
3 | 70 |
4 | 222 |
5 | 705 |
6 | 2238 |
7 | 7105 |
8 | 22556 |
9 | 71608 |
10 | 227332 |
11 | 721705 |
12 | 2291178 |
13 | 7273743 |
14 | 23091762 |
15 | 73308814 |
16 | 232731578 |
17 | 738846865 |
18 | 2345597854 |
19 | 7446508273 |
20 | 23640235416 |
21 | 75050038224 |
22 | 238259397096 |
23 | 756395887969 |
24 | 2401310279090 |
25 | 7623377054503 |
26 | 24201736119310 |
[2,7,22,70,222,705,2238,7105,22556,71608,227332, 721705,2291178,7273743,23091762,73308814, 232731578,738846865,2345597854,7446508273, 23640235416,75050038224,238259397096,756395887969, 2401310279090,7623377054503,24201736119310] |