A020221 - OEIS

A020221 as a simple table

n	a(n)
1	4
2	25
3	28
4	46
5	92
6	301
7	322
8	325
9	425
10	506
11	532
12	793
13	805
14	865
15	874
16	1081
17	1105
18	1393
19	1525
20	1645
21	1729
22	1771
23	2047
24	2071
25	2425
26	2465
27	2737
28	2926
29	3781
30	3913
31	4033
32	4187
33	4325
34	4465
35	4945
36	4996
37	5071
38	5149
39	5185
40	5405
41	5593
42	5713
43	5833
44	6601
45	6697
46	6721

[4,25,28,46,92,301,322,325,425,506,532,793,805, 865,874,1081,1105,1393,1525,1645,1729,1771,2047, 2071,2425,2465,2737,2926,3781,3913,4033,4187,4325, 4465,4945,4996,5071,5149,5185,5405,5593,5713,5833, 6601,6697,6721]