A230781 - cp's OEIS frontend

A230781 Squared radii of circles centered at a grid point in a triangular lattice hitting exactly 6 points. Squares or triple of squares that are not expressible as x^2+xy+y^2 with y > x > 0.

n	a(n)
1	1
2	3
3	4
4	9
5	12
6	16
7	25
8	27
9	36
10	48
11	64
12	75
13	81
14	100
15	108
16	121
17	144
18	192
19	225
20	243
21	256
22	289
23	300
24	324
25	363
26	400
27	432
28	484
29	529
30	576
31	625
32	675
33	729
34	768
35	841
36	867
37	900
38	972
39	1024
40	1089
41	1156
42	1200
43	1296
44	1452
45	1587
46	1600
47	1681
48	1728
49	1875
50	1936
51	2025
52	2116
53	2187
54	2209
55	2304
56	2500

[1, 3, 4, 9, 12, 16, 25, 27, 36, 48, 64, 75, 81, 100, 108, 121, 144, 192, 225, 243, 256, 289, 300, 324, 363, 400, 432, 484, 529, 576, 625, 675, 729, 768, 841, 867, 900, 972, 1024, 1089, 1156, 1200, 1296, 1452, 1587, 1600, 1681, 1728, 1875, 1936, 2025, 2116, 2187, 2209, 2304, 2500]

cp's OEIS Frontend

A230781 Squared radii of circles centered at a grid point in a triangular lattice hitting exactly 6 points. Squares or triple of squares that are not expressible as x^2+xy+y^2 with y > x > 0.

Table of values

List of values