n | a(n) |
---|---|
0 | 1 |
1 | 13 |
2 | 81 |
3 | 345 |
4 | 1155 |
5 | 3267 |
6 | 8151 |
7 | 18447 |
8 | 38610 |
9 | 75790 |
10 | 140998 |
11 | 250614 |
12 | 428298 |
13 | 707370 |
14 | 1133730 |
15 | 1769394 |
16 | 2696727 |
17 | 4023459 |
18 | 5888575 |
19 | 8469175 |
20 | 11988405 |
21 | 16724565 |
22 | 23021505 |
23 | 31300425 |
[1,13,81,345,1155,3267,8151,18447,38610,75790, 140998,250614,428298,707370,1133730,1769394, 2696727,4023459,5888575,8469175,11988405,16724565, 23021505,31300425] |