A383190 - cp's OEIS frontend

A383190 a(2n) and a(2n+1) are the square spiral numbers of the position on which the (n+1)th domino is placed, when tiling the plane by placing the dominos always as near as possible to the origin and so that no two dominos share a long side. Inverse permutation of A383191.

n	a(n)
0	0
1	1
2	3
3	4
4	5
5	6
6	7
7	22
8	2
9	11
10	8
11	9
12	10
13	27
14	14
15	13
16	18
17	17
18	15
19	16
20	19
21	20
22	21
23	44
24	23
25	46
26	12
27	29
28	24
29	25
30	33
31	34
32	39
33	40
34	45
35	76
36	28
37	53
38	32
39	31
40	38
41	37
42	26
43	51
44	35
45	36
46	41
47	42
48	43
49	74
50	47
51	78
52	52
53	85
54	60
55	59
56	68
57	67
58	61
59	62
60	69
61	70
62	75
63	114
64	77
65	116
66	30
67	55
68	48
69	49
70	54
71	87
72	58
73	57
74	66
75	65

[0, 1, 3, 4, 5, 6, 7, 22, 2, 11, 8, 9, 10, 27, 14, 13, 18, 17, 15, 16, 19, 20, 21, 44, 23, 46, 12, 29, 24, 25, 33, 34, 39, 40, 45, 76, 28, 53, 32, 31, 38, 37, 26, 51, 35, 36, 41, 42, 43, 74, 47, 78, 52, 85, 60, 59, 68, 67, 61, 62, 69, 70, 75, 114, 77, 116, 30, 55, 48, 49, 54, 87, 58, 57, 66, 65]

cp's OEIS Frontend

A383190 a(2n) and a(2n+1) are the square spiral numbers of the position on which the (n+1)th domino is placed, when tiling the plane by placing the dominos always as near as possible to the origin and so that no two dominos share a long side. Inverse permutation of A383191.

Table of values

List of values

n	a(n)
0	0
1	1
2	3
3	4
4	5
5	6
6	7
7	22
8	2
9	11
10	8
11	9
12	10
13	27
14	14
15	13
16	18
17	17
18	15
19	16
20	19
21	20
22	21
23	44
24	23
25	46
26	12
27	29
28	24
29	25
30	33
31	34
32	39
33	40
34	45
35	76
36	28
37	53
38	32
39	31
40	38
41	37
42	26
43	51
44	35
45	36
46	41
47	42
48	43
49	74
50	47
51	78
52	52
53	85
54	60
55	59
56	68
57	67
58	61
59	62
60	69
61	70
62	75
63	114
64	77
65	116
66	30
67	55
68	48
69	49
70	54
71	87
72	58
73	57
74	66
75	65

n	a(n)
0	0
1	1
2	3
3	4
4	5
5	6
6	7
7	22
8	2
9	11
10	8
11	9
12	10
13	27
14	14
15	13
16	18
17	17
18	15
19	16
20	19
21	20
22	21
23	44
24	23
25	46
26	12
27	29
28	24
29	25
30	33
31	34
32	39
33	40
34	45
35	76
36	28
37	53
38	32
39	31
40	38
41	37
42	26
43	51
44	35
45	36
46	41
47	42
48	43
49	74
50	47
51	78
52	52
53	85
54	60
55	59
56	68
57	67
58	61
59	62
60	69
61	70
62	75
63	114
64	77
65	116
66	30
67	55
68	48
69	49
70	54
71	87
72	58
73	57
74	66
75	65

n	a(n)
0	0
1	1
2	3
3	4
4	5
5	6
6	7
7	22
8	2
9	11
10	8
11	9
12	10
13	27
14	14
15	13
16	18
17	17
18	15
19	16
20	19
21	20
22	21
23	44
24	23
25	46
26	12
27	29
28	24
29	25
30	33
31	34
32	39
33	40
34	45
35	76
36	28
37	53
38	32
39	31
40	38
41	37
42	26
43	51
44	35
45	36
46	41
47	42
48	43
49	74
50	47
51	78
52	52
53	85
54	60
55	59
56	68
57	67
58	61
59	62
60	69
61	70
62	75
63	114
64	77
65	116
66	30
67	55
68	48
69	49
70	54
71	87
72	58
73	57
74	66
75	65