Reminder: The OEIS is hiring a new managing editor, and the application deadline is January 26.
n | a(n) |
---|---|
1 | 1 |
2 | 2 |
3 | 6 |
4 | 20 |
5 | 61 |
6 | 185 |
7 | 577 |
8 | 1788 |
9 | 5540 |
10 | 17165 |
11 | 52991 |
12 | 163600 |
13 | 504983 |
14 | 1557494 |
15 | 4800848 |
16 | 14791118 |
17 | 45548176 |
18 | 140205732 |
19 | 431413253 |
20 | 1326980704 |
21 | 4080331096 |
22 | 12542893726 |
23 | 38546177015 |
24 | 118428377799 |
25 | 363772262171 |
26 | 1117147291580 |
27 | 3430089594015 |
[1,2,6,20,61,185,577,1788,5540,17165,52991,163600, 504983,1557494,4800848,14791118,45548176, 140205732,431413253,1326980704,4080331096, 12542893726,38546177015,118428377799,363772262171, 1117147291580,3430089594015] |