n | a(n) |
---|---|
0 | 1 |
1 | 0 |
2 | 1 |
3 | 2 |
4 | 9 |
5 | 44 |
6 | 265 |
7 | 1854 |
8 | 14833 |
9 | 133496 |
10 | 1334961 |
11 | 14684570 |
12 | 176214841 |
13 | 2290792932 |
14 | 32071101049 |
15 | 481066515734 |
16 | 7697064251745 |
17 | 130850092279664 |
18 | 2355301661033953 |
19 | 44750731559645106 |
20 | 895014631192902121 |
21 | 18795307255050944540 |
22 | 145060238642780180480 |
23 | 1118480911876659396600 |
[1,0,1,2,9,44,265,1854,14833,133496,1334961, 14684570,176214841,2290792932,32071101049, 481066515734,7697064251745,130850092279664, 2355301661033953,44750731559645106, 895014631192902121,18795307255050944540, 145060238642780180480,1118480911876659396600] |