A345439 - cp's OEIS frontend

A345439 Consider the Eisenstein integers x + yomega, x and y rational integers, represented as the cells of an hexagonal grid; draw a hexagonal spiral as in A345435; a(n) is the norm x^2-xy+y^2 of the Eisenstein integer in the n-th cell of the spiral.

n	a(n)
0	0
1	1
2	1
3	1
4	1
5	1
6	1
7	3
8	4
9	3
10	4
11	3
12	4
13	3
14	4
15	3
16	4
17	3
18	4
19	7
20	7
21	9
22	7
23	7
24	9
25	7
26	7
27	9
28	7
29	7
30	9
31	7
32	7
33	9
34	7
35	7
36	9
37	13
38	12
39	13
40	16
41	13
42	12
43	13
44	16
45	13
46	12
47	13
48	16
49	13
50	12
51	13
52	16
53	13
54	12
55	13
56	16
57	13
58	12
59	13
60	16
61	21
62	19
63	19
64	21
65	25
66	21
67	19
68	19
69	21
70	25
71	21
72	19
73	19

[0, 1, 1, 1, 1, 1, 1, 3, 4, 3, 4, 3, 4, 3, 4, 3, 4, 3, 4, 7, 7, 9, 7, 7, 9, 7, 7, 9, 7, 7, 9, 7, 7, 9, 7, 7, 9, 13, 12, 13, 16, 13, 12, 13, 16, 13, 12, 13, 16, 13, 12, 13, 16, 13, 12, 13, 16, 13, 12, 13, 16, 21, 19, 19, 21, 25, 21, 19, 19, 21, 25, 21, 19, 19]

cp's OEIS Frontend

A345439 Consider the Eisenstein integers x + yomega, x and y rational integers, represented as the cells of an hexagonal grid; draw a hexagonal spiral as in A345435; a(n) is the norm x^2-xy+y^2 of the Eisenstein integer in the n-th cell of the spiral.

Table of values

List of values

n	a(n)
0	0
1	1
2	1
3	1
4	1
5	1
6	1
7	3
8	4
9	3
10	4
11	3
12	4
13	3
14	4
15	3
16	4
17	3
18	4
19	7
20	7
21	9
22	7
23	7
24	9
25	7
26	7
27	9
28	7
29	7
30	9
31	7
32	7
33	9
34	7
35	7
36	9
37	13
38	12
39	13
40	16
41	13
42	12
43	13
44	16
45	13
46	12
47	13
48	16
49	13
50	12
51	13
52	16
53	13
54	12
55	13
56	16
57	13
58	12
59	13
60	16
61	21
62	19
63	19
64	21
65	25
66	21
67	19
68	19
69	21
70	25
71	21
72	19
73	19

n	a(n)
0	0
1	1
2	1
3	1
4	1
5	1
6	1
7	3
8	4
9	3
10	4
11	3
12	4
13	3
14	4
15	3
16	4
17	3
18	4
19	7
20	7
21	9
22	7
23	7
24	9
25	7
26	7
27	9
28	7
29	7
30	9
31	7
32	7
33	9
34	7
35	7
36	9
37	13
38	12
39	13
40	16
41	13
42	12
43	13
44	16
45	13
46	12
47	13
48	16
49	13
50	12
51	13
52	16
53	13
54	12
55	13
56	16
57	13
58	12
59	13
60	16
61	21
62	19
63	19
64	21
65	25
66	21
67	19
68	19
69	21
70	25
71	21
72	19
73	19

cp's OEIS Frontend

A345439 Consider the Eisenstein integers x + y*omega, x and y rational integers, represented as the cells of an hexagonal grid; draw a hexagonal spiral as in A345435; a(n) is the norm x^2-x*y+y^2 of the Eisenstein integer in the n-th cell of the spiral.

Table of values

List of values

A345439 Consider the Eisenstein integers x + yomega, x and y rational integers, represented as the cells of an hexagonal grid; draw a hexagonal spiral as in A345435; a(n) is the norm x^2-xy+y^2 of the Eisenstein integer in the n-th cell of the spiral.

n	a(n)
0	0
1	1
2	1
3	1
4	1
5	1
6	1
7	3
8	4
9	3
10	4
11	3
12	4
13	3
14	4
15	3
16	4
17	3
18	4
19	7
20	7
21	9
22	7
23	7
24	9
25	7
26	7
27	9
28	7
29	7
30	9
31	7
32	7
33	9
34	7
35	7
36	9
37	13
38	12
39	13
40	16
41	13
42	12
43	13
44	16
45	13
46	12
47	13
48	16
49	13
50	12
51	13
52	16
53	13
54	12
55	13
56	16
57	13
58	12
59	13
60	16
61	21
62	19
63	19
64	21
65	25
66	21
67	19
68	19
69	21
70	25
71	21
72	19
73	19