n | a(n) |
---|---|
0 | 0 |
1 | 2 |
2 | 15 |
3 | 60 |
4 | 170 |
5 | 390 |
6 | 777 |
7 | 1400 |
8 | 2340 |
9 | 3690 |
10 | 5555 |
11 | 8052 |
12 | 11310 |
13 | 15470 |
14 | 20685 |
15 | 27120 |
16 | 34952 |
17 | 44370 |
18 | 55575 |
19 | 68780 |
20 | 84210 |
21 | 102102 |
22 | 122705 |
23 | 146280 |
24 | 173100 |
25 | 203450 |
26 | 237627 |
27 | 275940 |
28 | 318710 |
29 | 366270 |
30 | 418965 |
31 | 477152 |
32 | 541200 |
33 | 611490 |
34 | 688415 |
35 | 772380 |
36 | 863802 |
37 | 963110 |
[0,2,15,60,170,390,777,1400,2340,3690,5555,8052, 11310,15470,20685,27120,34952,44370,55575,68780, 84210,102102,122705,146280,173100,203450,237627, 275940,318710,366270,418965,477152,541200,611490, 688415,772380,863802,963110] |