A220520 - OEIS

A220520 as a simple table

n	a(n)
0	0
1	1
2	3
3	7
4	11
5	15
6	19
7	27
8	35
9	39
10	43
11	51
12	63
13	79
14	91
15	107
16	123
17	127
18	131
19	139
20	151
21	167
22	187
23	211
24	237
25	261
26	273
27	293
28	325
29	365
30	393
31	425
32	457
33	461
34	465
35	473
36	485
37	501
38	521
39	545
40	571
41	595
42	615
43	647
44	691
45	755
46	807
47	855
48	909
49	944
50	961
51	981
52	1017
53	1065

[0,1,3,7,11,15,19,27,35,39,43,51,63,79,91,107,123, 127,131,139,151,167,187,211,237,261,273,293,325, 365,393,425,457,461,465,473,485,501,521,545,571, 595,615,647,691,755,807,855,909,944,961,981,1017, 1065]