n | a(n) |
---|---|
0 | 0 |
1 | 20 |
2 | 80 |
3 | 180 |
4 | 320 |
5 | 500 |
6 | 720 |
7 | 980 |
8 | 1280 |
9 | 1620 |
10 | 2000 |
11 | 2420 |
12 | 2880 |
13 | 3380 |
14 | 3920 |
15 | 4500 |
16 | 5120 |
17 | 5780 |
18 | 6480 |
19 | 7220 |
20 | 8000 |
21 | 8820 |
22 | 9680 |
23 | 10580 |
24 | 11520 |
25 | 12500 |
26 | 13520 |
27 | 14580 |
28 | 15680 |
29 | 16820 |
30 | 18000 |
31 | 19220 |
32 | 20480 |
33 | 21780 |
34 | 23120 |
35 | 24500 |
36 | 25920 |
37 | 27380 |
38 | 28880 |
39 | 30420 |
40 | 32000 |
[0,20,80,180,320,500,720,980,1280,1620,2000,2420, 2880,3380,3920,4500,5120,5780,6480,7220,8000,8820, 9680,10580,11520,12500,13520,14580,15680,16820, 18000,19220,20480,21780,23120,24500,25920,27380, 28880,30420,32000] |