A076825 - OEIS

A076825 as a simple table

n	a(n)
1	3
2	15
3	21
4	51
5	65
6	95
7	165
8	255
9	261
10	273
11	285
12	295
13	345
14	387
15	465
16	507
17	513
18	565
19	641
20	837
21	1025
22	1353
23	1665
24	1731
25	1845
26	1953
27	1971
28	2013
29	2123
30	2193
31	2231
32	2325
33	2979
34	3087
35	3237
36	3591
37	3615
38	3645
39	3865
40	4097
41	4369
42	4405
43	4445
44	4655
45	4697
46	4797
47	4995

[3,15,21,51,65,95,165,255,261,273,285,295,345,387, 465,507,513,565,641,837,1025,1353,1665,1731,1845, 1953,1971,2013,2123,2193,2231,2325,2979,3087,3237, 3591,3615,3645,3865,4097,4369,4405,4445,4655,4697, 4797,4995]