n | a(n) |
---|---|
1 | 0 |
2 | 51 |
3 | 120 |
4 | 267 |
5 | 540 |
6 | 931 |
7 | 1780 |
8 | 3367 |
9 | 5644 |
10 | 10591 |
11 | 19840 |
12 | 33111 |
13 | 61944 |
14 | 115851 |
15 | 193200 |
16 | 361251 |
17 | 675444 |
18 | 1126267 |
19 | 2105740 |
20 | 3936991 |
21 | 6564580 |
22 | 12273367 |
23 | 22946680 |
24 | 38261391 |
25 | 71534640 |
26 | 133743267 |
27 | 223003944 |
28 | 416934651 |
29 | 779513100 |
30 | 1299762451 |
[0,51,120,267,540,931,1780,3367,5644,10591,19840, 33111,61944,115851,193200,361251,675444,1126267, 2105740,3936991,6564580,12273367,22946680, 38261391,71534640,133743267,223003944,416934651, 779513100,1299762451] |