A034018 - cp's OEIS frontend

A034018 Numbers that are represented by x^2+xy+y^2 but not primitively.

n	a(n)
1	4
2	9
3	12
4	16
5	25
6	27
7	28
8	36
9	48
10	52
11	63
12	64
13	75
14	76
15	81
16	84
17	100
18	108
19	112
20	117
21	121
22	124
23	144
24	148
25	156
26	171
27	172
28	175
29	189
30	192
31	196
32	208
33	225
34	228
35	243
36	244
37	252
38	256
39	268
40	279
41	289
42	292
43	300
44	304
45	316
46	324
47	325
48	333
49	336
50	351
51	363
52	364
53	372
54	387
55	388
56	400

[4, 9, 12, 16, 25, 27, 28, 36, 48, 52, 63, 64, 75, 76, 81, 84, 100, 108, 112, 117, 121, 124, 144, 148, 156, 171, 172, 175, 189, 192, 196, 208, 225, 228, 243, 244, 252, 256, 268, 279, 289, 292, 300, 304, 316, 324, 325, 333, 336, 351, 363, 364, 372, 387, 388, 400]

cp's OEIS Frontend

A034018 Numbers that are represented by x^2+xy+y^2 but not primitively.

Table of values

List of values

n	a(n)
1	4
2	9
3	12
4	16
5	25
6	27
7	28
8	36
9	48
10	52
11	63
12	64
13	75
14	76
15	81
16	84
17	100
18	108
19	112
20	117
21	121
22	124
23	144
24	148
25	156
26	171
27	172
28	175
29	189
30	192
31	196
32	208
33	225
34	228
35	243
36	244
37	252
38	256
39	268
40	279
41	289
42	292
43	300
44	304
45	316
46	324
47	325
48	333
49	336
50	351
51	363
52	364
53	372
54	387
55	388
56	400

n	a(n)
1	4
2	9
3	12
4	16
5	25
6	27
7	28
8	36
9	48
10	52
11	63
12	64
13	75
14	76
15	81
16	84
17	100
18	108
19	112
20	117
21	121
22	124
23	144
24	148
25	156
26	171
27	172
28	175
29	189
30	192
31	196
32	208
33	225
34	228
35	243
36	244
37	252
38	256
39	268
40	279
41	289
42	292
43	300
44	304
45	316
46	324
47	325
48	333
49	336
50	351
51	363
52	364
53	372
54	387
55	388
56	400

n	a(n)
1	4
2	9
3	12
4	16
5	25
6	27
7	28
8	36
9	48
10	52
11	63
12	64
13	75
14	76
15	81
16	84
17	100
18	108
19	112
20	117
21	121
22	124
23	144
24	148
25	156
26	171
27	172
28	175
29	189
30	192
31	196
32	208
33	225
34	228
35	243
36	244
37	252
38	256
39	268
40	279
41	289
42	292
43	300
44	304
45	316
46	324
47	325
48	333
49	336
50	351
51	363
52	364
53	372
54	387
55	388
56	400