A227771 - OEIS

A227771 as a simple table

n	a(n)
1	20
2	50
3	117
4	180
5	200
6	242
7	325
8	450
9	468
10	500
11	578
12	605
13	650
14	800
15	968
16	980
17	1025
18	1058
19	1280
20	1300
21	1445
22	1476
23	1620
24	1682
25	1700
26	1800
27	1872
28	2178
29	2312
30	2340
31	2420
32	2450
33	2600
34	2645
35	2925
36	3200
37	3362
38	3380
39	3757
40	3872
41	4050
42	4100
43	4205
44	4232
45	4352
46	4418
47	4500
48	4693
49	5200

[20,50,117,180,200,242,325,450,468,500,578,605, 650,800,968,980,1025,1058,1280,1300,1445,1476, 1620,1682,1700,1800,1872,2178,2312,2340,2420,2450, 2600,2645,2925,3200,3362,3380,3757,3872,4050,4100, 4205,4232,4352,4418,4500,4693,5200]