n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 3 |
3 | 6 |
4 | 18 |
5 | 47 |
6 | 141 |
7 | 432 |
8 | 1329 |
9 | 4452 |
10 | 14295 |
11 | 49817 |
12 | 167179 |
13 | 591475 |
14 | 2062501 |
15 | 7357786 |
16 | 26446105 |
17 | 95239479 |
18 | 349688079 |
19 | 1274422929 |
20 | 4742103229 |
21 | 17511528513 |
22 | 65687166495 |
23 | 245724681207 |
24 | 926977717315 |
25 | 3507504480858 |
26 | 13301679890417 |
27 | 50792123226168 |
28 | 193720256273361 |
29 | 744703358194793 |
30 | 2857772882473509 |
[1,1,3,6,18,47,141,432,1329,4452,14295,49817, 167179,591475,2062501,7357786,26446105,95239479, 349688079,1274422929,4742103229,17511528513, 65687166495,245724681207,926977717315, 3507504480858,13301679890417,50792123226168, 193720256273361,744703358194793,2857772882473509] |