Reminder: The OEIS is hiring a new managing editor, and the application deadline is January 26.
n | a(n) |
---|---|
3 | 0 |
4 | 0 |
5 | 4 |
6 | 5 |
7 | 9 |
8 | 26 |
9 | 47 |
10 | 120 |
11 | 309 |
12 | 612 |
13 | 1449 |
14 | 3708 |
15 | 8653 |
16 | 20721 |
17 | 53261 |
18 | 133949 |
19 | 333428 |
20 | 865874 |
21 | 2254196 |
22 | 5819271 |
23 | 15294876 |
24 | 40448411 |
25 | 106628317 |
26 | 282842205 |
27 | 753174274 |
28 | 2004759492 |
29 | 5347626549 |
30 | 14291732370 |
[0,0,4,5,9,26,47,120,309,612,1449,3708,8653,20721, 53261,133949,333428,865874,2254196,5819271, 15294876,40448411,106628317,282842205,753174274, 2004759492,5347626549,14291732370] |