n | a(n) |
---|---|
0 | 4 |
1 | 13 |
2 | 42 |
3 | 136 |
4 | 440 |
5 | 1424 |
6 | 4609 |
7 | 14918 |
8 | 48285 |
9 | 156284 |
10 | 505844 |
11 | 1637264 |
12 | 5299328 |
13 | 17152321 |
14 | 55516872 |
15 | 179691313 |
16 | 581606398 |
17 | 1882483892 |
18 | 6093030640 |
19 | 19721296176 |
20 | 63831867233 |
21 | 206604436042 |
22 | 668716032329 |
23 | 2164431415224 |
24 | 7005609443657 |
25 | 22675037578854 |
[4,13,42,136,440,1424,4609,14918,48285,156284, 505844,1637264,5299328,17152321,55516872, 179691313,581606398,1882483892,6093030640, 19721296176,63831867233,206604436042,668716032329, 2164431415224,7005609443657,22675037578854] |