n | a(n) |
---|---|
0 | 0 |
1 | 0 |
2 | 6 |
3 | 45 |
4 | 190 |
5 | 595 |
6 | 1540 |
7 | 3486 |
8 | 7140 |
9 | 13530 |
10 | 24090 |
11 | 40755 |
12 | 66066 |
13 | 103285 |
14 | 156520 |
15 | 230860 |
16 | 332520 |
17 | 468996 |
18 | 649230 |
19 | 883785 |
20 | 1185030 |
21 | 1567335 |
22 | 2047276 |
23 | 2643850 |
24 | 3378700 |
25 | 4276350 |
26 | 5364450 |
27 | 6674031 |
28 | 8239770 |
29 | 10100265 |
30 | 12298320 |
31 | 14881240 |
[0,0,6,45,190,595,1540,3486,7140,13530,24090, 40755,66066,103285,156520,230860,332520,468996, 649230,883785,1185030,1567335,2047276,2643850, 3378700,4276350,5364450,6674031,8239770,10100265, 12298320,14881240] |