n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 5 |
4 | 19 |
5 | 60 |
6 | 227 |
7 | 809 |
8 | 3310 |
9 | 12663 |
10 | 53248 |
11 | 213217 |
12 | 918373 |
13 | 3796553 |
14 | 16616890 |
15 | 70310328 |
16 | 311537659 |
17 | 1341681580 |
18 | 6001753284 |
19 | 26205738839 |
20 | 118120354572 |
21 | 521464321540 |
22 | 2365096085563 |
23 | 10535212139384 |
24 | 48029306987720 |
25 | 215539833379686 |
26 | 986915535822941 |
27 | 4456681940039117 |
28 | 20482312775594355 |
[1,1,2,5,19,60,227,809,3310,12663,53248,213217, 918373,3796553,16616890,70310328,311537659, 1341681580,6001753284,26205738839,118120354572, 521464321540,2365096085563,10535212139384, 48029306987720,215539833379686,986915535822941, 4456681940039117,20482312775594355] |