n | a(n) |
---|---|
0 | 2 |
1 | 4 |
2 | 9 |
3 | 23 |
4 | 55 |
5 | 126 |
6 | 292 |
7 | 679 |
8 | 1579 |
9 | 3671 |
10 | 8534 |
11 | 19839 |
12 | 46120 |
13 | 107216 |
14 | 249247 |
15 | 579429 |
16 | 1347009 |
17 | 3131416 |
18 | 7279659 |
19 | 16923154 |
20 | 39341560 |
21 | 91458031 |
22 | 212614127 |
23 | 494267879 |
24 | 1149033414 |
25 | 2671178611 |
26 | 6209736884 |
27 | 14435886844 |
28 | 33559365375 |
[2,4,9,23,55,126,292,679,1579,3671,8534,19839, 46120,107216,249247,579429,1347009,3131416, 7279659,16923154,39341560,91458031,212614127, 494267879,1149033414,2671178611,6209736884, 14435886844,33559365375] |