n | a(n) |
---|---|
0 | 1 |
1 | 3 |
2 | 9 |
3 | 25 |
4 | 66 |
5 | 169 |
6 | 425 |
7 | 1058 |
8 | 2621 |
9 | 6485 |
10 | 16066 |
11 | 39921 |
12 | 99601 |
13 | 249666 |
14 | 628917 |
15 | 1592029 |
16 | 4048866 |
17 | 10341577 |
18 | 26517113 |
19 | 68226722 |
20 | 176065901 |
21 | 455514533 |
22 | 1181040514 |
23 | 3067684065 |
24 | 7980068641 |
25 | 20784441474 |
26 | 54188706405 |
27 | 141395801773 |
[1,3,9,25,66,169,425,1058,2621,6485,16066,39921, 99601,249666,628917,1592029,4048866,10341577, 26517113,68226722,176065901,455514533,1181040514, 3067684065,7980068641,20784441474,54188706405, 141395801773] |