Reminder: The OEIS is hiring a new managing editor, and the application deadline is January 26.
n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 6 |
4 | 20 |
5 | 69 |
6 | 245 |
7 | 896 |
8 | 3362 |
9 | 12869 |
10 | 50024 |
11 | 196896 |
12 | 783205 |
13 | 3143713 |
14 | 12717532 |
15 | 51798089 |
16 | 212233756 |
17 | 874193355 |
18 | 3617797596 |
19 | 15035379576 |
20 | 62724649455 |
21 | 262579756558 |
22 | 1102680011825 |
23 | 4643936681122 |
24 | 19609621413193 |
25 | 83005706694022 |
26 | 352145760387515 |
27 | 1497067760933244 |
[1,1,2,6,20,69,245,896,3362,12869,50024,196896, 783205,3143713,12717532,51798089,212233756, 874193355,3617797596,15035379576,62724649455, 262579756558,1102680011825,4643936681122, 19609621413193,83005706694022,352145760387515, 1497067760933244] |