n | a(n) |
---|---|
0 | 3 |
1 | 9 |
2 | 25 |
3 | 63 |
4 | 153 |
5 | 359 |
6 | 819 |
7 | 1830 |
8 | 4018 |
9 | 8694 |
10 | 18582 |
11 | 39298 |
12 | 82350 |
13 | 171186 |
14 | 353338 |
15 | 724719 |
16 | 1478061 |
17 | 2999175 |
18 | 6057687 |
19 | 12183945 |
20 | 24411935 |
21 | 48740193 |
22 | 96998325 |
23 | 192459996 |
24 | 380812692 |
25 | 751557756 |
26 | 1479686972 |
27 | 2906717460 |
28 | 5698014924 |
29 | 11147786740 |
30 | 21769549380 |
[3,9,25,63,153,359,819,1830,4018,8694,18582,39298, 82350,171186,353338,724719,1478061,2999175, 6057687,12183945,24411935,48740193,96998325, 192459996,380812692,751557756,1479686972, 2906717460,5698014924,11147786740,21769549380] |