A090915 - cp's OEIS frontend

A090915 Permutation of natural numbers arising from a square spiral.

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

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

cp's OEIS Frontend

A090915 Permutation of natural numbers arising from a square spiral.

Table of values

List of values

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

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

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