n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 9 |
3 | 31 |
4 | 141 |
5 | 579 |
6 | 2615 |
7 | 11614 |
8 | 52822 |
9 | 242632 |
10 | 1119881 |
11 | 5220036 |
12 | 24434712 |
13 | 114912593 |
14 | 543292303 |
15 | 2574373387 |
16 | 12251435551 |
17 | 58432107543 |
18 | 279438870548 |
19 | 1339581617915 |
20 | 6433105200117 |
21 | 30959108797066 |
22 | 149219033827871 |
23 | 720359664937929 |
24 | 3482662447772157 |
25 | 16858065719482400 |
26 | 81707808384082981 |
[1,2,9,31,141,579,2615,11614,52822,242632,1119881, 5220036,24434712,114912593,543292303,2574373387, 12251435551,58432107543,279438870548, 1339581617915,6433105200117,30959108797066, 149219033827871,720359664937929,3482662447772157, 16858065719482400,81707808384082981] |