n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 21 |
3 | 225 |
4 | 3328 |
5 | 33518 |
6 | 257909 |
7 | 1544907 |
8 | 7657779 |
9 | 32454761 |
10 | 121100938 |
11 | 405911691 |
12 | 1242567609 |
13 | 3517715389 |
14 | 9305703095 |
15 | 23194232130 |
16 | 54848107788 |
17 | 123760738779 |
18 | 267768667311 |
19 | 557808040826 |
20 | 1122804257019 |
21 | 2190539008704 |
22 | 4153269969884 |
23 | 7670791137960 |
[1,2,21,225,3328,33518,257909,1544907,7657779, 32454761,121100938,405911691,1242567609, 3517715389,9305703095,23194232130,54848107788, 123760738779,267768667311,557808040826, 1122804257019,2190539008704,4153269969884, 7670791137960] |