Reminder: The OEIS is hiring a new managing editor, and the application deadline is January 26.
n | a(n) |
---|---|
1 | 0 |
2 | 1 |
3 | 18 |
4 | 153 |
5 | 770 |
6 | 2859 |
7 | 8694 |
8 | 22924 |
9 | 54272 |
10 | 118057 |
11 | 239798 |
12 | 460207 |
13 | 841930 |
14 | 1478451 |
15 | 2505634 |
16 | 4116442 |
17 | 6579440 |
18 | 10261761 |
19 | 15657290 |
20 | 23420901 |
21 | 34409666 |
22 | 49732043 |
23 | 70806142 |
24 | 99428264 |
25 | 137853008 |
26 | 188886345 |
27 | 255993166 |
28 | 343420923 |
[0,1,18,153,770,2859,8694,22924,54272,118057, 239798,460207,841930,1478451,2505634,4116442, 6579440,10261761,15657290,23420901,34409666, 49732043,70806142,99428264,137853008,188886345, 255993166,343420923] |