n | a(n) |
---|---|
1 | 0 |
2 | 0 |
3 | 7 |
4 | 45 |
5 | 225 |
6 | 709 |
7 | 1974 |
8 | 4524 |
9 | 9614 |
10 | 18382 |
11 | 33425 |
12 | 56895 |
13 | 93447 |
14 | 146715 |
15 | 224280 |
16 | 331814 |
17 | 480844 |
18 | 679724 |
19 | 945099 |
20 | 1288737 |
21 | 1733725 |
22 | 2296065 |
23 | 3006762 |
24 | 3886960 |
25 | 4977210 |
26 | 6304794 |
27 | 7921589 |
28 | 9862099 |
29 | 12191459 |
30 | 14952567 |
31 | 18225900 |
32 | 22064010 |
33 | 26564952 |
34 | 31792280 |
[0,0,7,45,225,709,1974,4524,9614,18382,33425, 56895,93447,146715,224280,331814,480844,679724, 945099,1288737,1733725,2296065,3006762,3886960, 4977210,6304794,7921589,9862099,12191459,14952567, 18225900,22064010,26564952,31792280] |