A337988 - OEIS

A337988 as a simple table

n	a(n)
1	20
2	80
3	90
4	180
5	272
6	320
7	360
8	468
9	500
10	650
11	720
12	810
13	980
14	1088
15	1280
16	1332
17	1440
18	1620
19	1872
20	2000
21	2250
22	2420
23	2448
24	2450
25	2600
26	2880
27	2900
28	3240
29	3380
30	3600
31	3920
32	4160
33	4212
34	4352
35	4410
36	4500
37	5120
38	5328
39	5760
40	5780
41	5850
42	6480
43	6642
44	6800
45	7220
46	7290
47	7488
48	7650

[20,80,90,180,272,320,360,468,500,650,720,810,980, 1088,1280,1332,1440,1620,1872,2000,2250,2420,2448, 2450,2600,2880,2900,3240,3380,3600,3920,4160,4212, 4352,4410,4500,5120,5328,5760,5780,5850,6480,6642, 6800,7220,7290,7488,7650]