A090928 - cp's OEIS frontend

A090928 Permutation of natural numbers arising from a square spiral.

n	a(n)
1	1
2	6
3	7
4	8
5	9
6	2
7	3
8	4
9	5
10	18
11	19
12	20
13	21
14	22
15	23
16	24
17	25
18	10
19	11
20	12
21	13
22	14
23	15
24	16
25	17
26	38
27	39
28	40
29	41
30	42
31	43
32	44
33	45
34	46
35	47
36	48
37	49
38	26
39	27
40	28
41	29
42	30
43	31
44	32
45	33
46	34
47	35
48	36
49	37
50	66
51	67
52	68
53	69
54	70
55	71
56	72
57	73
58	74
59	75
60	76
61	77
62	78
63	79
64	80
65	81
66	50
67	51
68	52
69	53
70	54
71	55
72	56

[1, 6, 7, 8, 9, 2, 3, 4, 5, 18, 19, 20, 21, 22, 23, 24, 25, 10, 11, 12, 13, 14, 15, 16, 17, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 50, 51, 52, 53, 54, 55, 56]

cp's OEIS Frontend

A090928 Permutation of natural numbers arising from a square spiral.

Table of values

List of values

n	a(n)
1	1
2	6
3	7
4	8
5	9
6	2
7	3
8	4
9	5
10	18
11	19
12	20
13	21
14	22
15	23
16	24
17	25
18	10
19	11
20	12
21	13
22	14
23	15
24	16
25	17
26	38
27	39
28	40
29	41
30	42
31	43
32	44
33	45
34	46
35	47
36	48
37	49
38	26
39	27
40	28
41	29
42	30
43	31
44	32
45	33
46	34
47	35
48	36
49	37
50	66
51	67
52	68
53	69
54	70
55	71
56	72
57	73
58	74
59	75
60	76
61	77
62	78
63	79
64	80
65	81
66	50
67	51
68	52
69	53
70	54
71	55
72	56

n	a(n)
1	1
2	6
3	7
4	8
5	9
6	2
7	3
8	4
9	5
10	18
11	19
12	20
13	21
14	22
15	23
16	24
17	25
18	10
19	11
20	12
21	13
22	14
23	15
24	16
25	17
26	38
27	39
28	40
29	41
30	42
31	43
32	44
33	45
34	46
35	47
36	48
37	49
38	26
39	27
40	28
41	29
42	30
43	31
44	32
45	33
46	34
47	35
48	36
49	37
50	66
51	67
52	68
53	69
54	70
55	71
56	72
57	73
58	74
59	75
60	76
61	77
62	78
63	79
64	80
65	81
66	50
67	51
68	52
69	53
70	54
71	55
72	56

n	a(n)
1	1
2	6
3	7
4	8
5	9
6	2
7	3
8	4
9	5
10	18
11	19
12	20
13	21
14	22
15	23
16	24
17	25
18	10
19	11
20	12
21	13
22	14
23	15
24	16
25	17
26	38
27	39
28	40
29	41
30	42
31	43
32	44
33	45
34	46
35	47
36	48
37	49
38	26
39	27
40	28
41	29
42	30
43	31
44	32
45	33
46	34
47	35
48	36
49	37
50	66
51	67
52	68
53	69
54	70
55	71
56	72
57	73
58	74
59	75
60	76
61	77
62	78
63	79
64	80
65	81
66	50
67	51
68	52
69	53
70	54
71	55
72	56