n | a(n) |
---|---|
4 | 1 |
5 | 5 |
6 | 19 |
7 | 70 |
8 | 259 |
9 | 962 |
10 | 3585 |
11 | 13399 |
12 | 50201 |
13 | 188481 |
14 | 709001 |
15 | 2671624 |
16 | 10082895 |
17 | 38107919 |
18 | 144214978 |
19 | 546413880 |
20 | 2072553851 |
21 | 7869081412 |
22 | 29904874545 |
23 | 113744129791 |
24 | 432969825404 |
25 | 1649313815911 |
26 | 6287005845873 |
27 | 23980562901849 |
28 | 91523321091182 |
29 | 349497990760012 |
[1,5,19,70,259,962,3585,13399,50201,188481,709001, 2671624,10082895,38107919,144214978,546413880, 2072553851,7869081412,29904874545,113744129791, 432969825404,1649313815911,6287005845873, 23980562901849,91523321091182,349497990760012] |