n | a(n) |
---|---|
0 | 0 |
1 | 3 |
2 | 9 |
3 | 26 |
4 | 78 |
5 | 234 |
6 | 702 |
7 | 2106 |
8 | 6318 |
9 | 18954 |
10 | 56862 |
11 | 170586 |
12 | 511758 |
13 | 1535274 |
14 | 4605822 |
15 | 13817466 |
16 | 41452398 |
17 | 124357194 |
18 | 373071582 |
19 | 1119214746 |
20 | 3357644238 |
21 | 10072932714 |
22 | 30218798142 |
23 | 90656394426 |
24 | 271969183278 |
25 | 815907549834 |
[0,3,9,26,78,234,702,2106,6318,18954,56862,170586, 511758,1535274,4605822,13817466,41452398, 124357194,373071582,1119214746,3357644238, 10072932714,30218798142,90656394426,271969183278, 815907549834] |