n | a(n) |
---|---|
0 | 1 |
1 | 4 |
2 | 8 |
3 | 22 |
4 | 50 |
5 | 124 |
6 | 290 |
7 | 694 |
8 | 1628 |
9 | 3838 |
10 | 8978 |
11 | 21004 |
12 | 48962 |
13 | 114022 |
14 | 265004 |
15 | 615262 |
16 | 1426658 |
17 | 3305212 |
18 | 7650722 |
19 | 17697430 |
20 | 40911740 |
21 | 94528318 |
22 | 218312114 |
23 | 503994220 |
24 | 1163124866 |
25 | 2683496134 |
26 | 6189647948 |
27 | 14273690782 |
[1,4,8,22,50,124,290,694,1628,3838,8978,21004, 48962,114022,265004,615262,1426658,3305212, 7650722,17697430,40911740,94528318,218312114, 503994220,1163124866,2683496134,6189647948, 14273690782] |