n | a(n) |
---|---|
1 | 1 |
2 | 21 |
3 | 140 |
4 | 1095 |
5 | 4919 |
6 | 27000 |
7 | 97341 |
8 | 383172 |
9 | 1188521 |
10 | 3704820 |
11 | 9947816 |
12 | 27240277 |
13 | 65292069 |
14 | 157646021 |
15 | 349738426 |
16 | 770969390 |
17 | 1585648871 |
18 | 3256248216 |
19 | 6303135880 |
20 | 12177430692 |
21 | 22459794938 |
22 | 41128002746 |
23 | 72582886199 |
24 | 127586136583 |
[1,21,140,1095,4919,27000,97341,383172,1188521, 3704820,9947816,27240277,65292069,157646021, 349738426,770969390,1585648871,3256248216, 6303135880,12177430692,22459794938,41128002746, 72582886199,127586136583] |