Reminder: The OEIS is hiring a new managing editor, and the application deadline is January 26.
n | a(n) |
---|---|
0 | 0 |
1 | 1 |
2 | 4 |
3 | 21 |
4 | 130 |
5 | 931 |
6 | 7578 |
7 | 69133 |
8 | 698908 |
9 | 7757121 |
10 | 93784360 |
11 | 1226953801 |
12 | 17271137574 |
13 | 260294017411 |
14 | 4181975416150 |
15 | 71353876091961 |
16 | 1288551745071448 |
17 | 24553837032449473 |
18 | 492365292394060908 |
19 | 10364224977307728541 |
20 | 228505314793164088810 |
[0,1,4,21,130,931,7578,69133,698908,7757121, 93784360,1226953801,17271137574,260294017411, 4181975416150,71353876091961,1288551745071448, 24553837032449473,492365292394060908, 10364224977307728541,228505314793164088810] |