n | a(n) |
---|---|
0 | 1 |
1 | 20 |
2 | 174 |
3 | 988 |
4 | 4277 |
5 | 15288 |
6 | 47320 |
7 | 130832 |
8 | 330174 |
9 | 772616 |
10 | 1696396 |
11 | 3527160 |
12 | 6995534 |
13 | 13312768 |
14 | 24426552 |
15 | 43385360 |
16 | 74847175 |
17 | 125777340 |
18 | 206390730 |
19 | 331405620 |
20 | 521690715 |
21 | 806403000 |
22 | 1225732560 |
23 | 1834391520 |
24 | 2706007980 |
25 | 3938612496 |
26 | 5661434520 |
27 | 8043259504 |
[1,20,174,988,4277,15288,47320,130832,330174, 772616,1696396,3527160,6995534,13312768,24426552, 43385360,74847175,125777340,206390730,331405620, 521690715,806403000,1225732560,1834391520, 2706007980,3938612496,5661434520,8043259504] |