n | a(n) |
---|---|
1 | 1 |
2 | 5 |
3 | 19 |
4 | 66 |
5 | 216 |
6 | 679 |
7 | 2075 |
8 | 6211 |
9 | 18299 |
10 | 53244 |
11 | 153366 |
12 | 438095 |
13 | 1242709 |
14 | 3504161 |
15 | 9830371 |
16 | 27454614 |
17 | 76375860 |
18 | 211732471 |
19 | 585157679 |
20 | 1612689439 |
21 | 4433421131 |
22 | 12160156560 |
23 | 33284285874 |
24 | 90931830431 |
[1,5,19,66,216,679,2075,6211,18299,53244,153366, 438095,1242709,3504161,9830371,27454614,76375860, 211732471,585157679,1612689439,4433421131, 12160156560,33284285874,90931830431] |