n | a(n) |
---|---|
0 | 0 |
1 | 1 |
2 | 21 |
3 | 156 |
4 | 700 |
5 | 2325 |
6 | 6321 |
7 | 14896 |
8 | 31536 |
9 | 61425 |
10 | 111925 |
11 | 193116 |
12 | 318396 |
13 | 505141 |
14 | 775425 |
15 | 1156800 |
16 | 1683136 |
17 | 2395521 |
18 | 3343221 |
19 | 4584700 |
20 | 6188700 |
21 | 8235381 |
22 | 10817521 |
23 | 14041776 |
24 | 18030000 |
25 | 22920625 |
26 | 28870101 |
27 | 36054396 |
28 | 44670556 |
29 | 54938325 |
30 | 67101825 |
31 | 81431296 |
32 | 98224896 |
[0,1,21,156,700,2325,6321,14896,31536,61425, 111925,193116,318396,505141,775425,1156800, 1683136,2395521,3343221,4584700,6188700,8235381, 10817521,14041776,18030000,22920625,28870101, 36054396,44670556,54938325,67101825,81431296, 98224896] |