A220171 - cp's OEIS frontend

A220171 An ordered subset of primitive values of x^2 + x*y + y^2 where at least two ordered pairs (x1,y1) and (x2,y2) with x1 != x2, y1 != y2 and gcd(x1,y1) = gcd(x2,y2) = 1 yield identical primitive values.

n	a(n)
1	91
2	133
3	217
4	247
5	259
6	273
7	301
8	399
9	403
10	427
11	469
12	481
13	511
14	553
15	559
16	589
17	637
18	651
19	679
20	703
21	721
22	741
23	763
24	777
25	793
26	817
27	871
28	889
29	903
30	931
31	949
32	973
33	1027
34	1057
35	1099
36	1141
37	1147
38	1159
39	1183
40	1209
41	1261
42	1267
43	1273
44	1281
45	1333
46	1339
47	1351

[91, 133, 217, 247, 259, 273, 301, 399, 403, 427, 469, 481, 511, 553, 559, 589, 637, 651, 679, 703, 721, 741, 763, 777, 793, 817, 871, 889, 903, 931, 949, 973, 1027, 1057, 1099, 1141, 1147, 1159, 1183, 1209, 1261, 1267, 1273, 1281, 1333, 1339, 1351]

cp's OEIS Frontend

A220171 An ordered subset of primitive values of x^2 + x*y + y^2 where at least two ordered pairs (x1,y1) and (x2,y2) with x1 != x2, y1 != y2 and gcd(x1,y1) = gcd(x2,y2) = 1 yield identical primitive values.

Table of values

List of values