A235913 - cp's OEIS frontend

A235913 a(n) is the Manhattan distance between n^3 and (n+1)^3 in a square spiral of positive integers with 1 at the center.

n	a(n)
1	1
2	3
3	11
4	15
5	13
6	9
7	5
8	21
9	33
10	59
11	71
12	49
13	47
14	35
15	15
16	13
17	43
18	73
19	109
20	123
21	117
22	109
23	167
24	141
25	113
26	77
27	43
28	5
29	51
30	95
31	145
32	201
33	263
34	281
35	397
36	413
37	317
38	333
39	269
40	239
41	183
42	121
43	63
44	11
45	81
46	147
47	219
48	307
49	379
50	471
51	567
52	623
53	517
54	569
55	683
56	503
57	545
58	473
59	395
60	311

[1, 3, 11, 15, 13, 9, 5, 21, 33, 59, 71, 49, 47, 35, 15, 13, 43, 73, 109, 123, 117, 109, 167, 141, 113, 77, 43, 5, 51, 95, 145, 201, 263, 281, 397, 413, 317, 333, 269, 239, 183, 121, 63, 11, 81, 147, 219, 307, 379, 471, 567, 623, 517, 569, 683, 503, 545, 473, 395, 311]

cp's OEIS Frontend

A235913 a(n) is the Manhattan distance between n^3 and (n+1)^3 in a square spiral of positive integers with 1 at the center.

Table of values

List of values

n	a(n)
1	1
2	3
3	11
4	15
5	13
6	9
7	5
8	21
9	33
10	59
11	71
12	49
13	47
14	35
15	15
16	13
17	43
18	73
19	109
20	123
21	117
22	109
23	167
24	141
25	113
26	77
27	43
28	5
29	51
30	95
31	145
32	201
33	263
34	281
35	397
36	413
37	317
38	333
39	269
40	239
41	183
42	121
43	63
44	11
45	81
46	147
47	219
48	307
49	379
50	471
51	567
52	623
53	517
54	569
55	683
56	503
57	545
58	473
59	395
60	311

n	a(n)
1	1
2	3
3	11
4	15
5	13
6	9
7	5
8	21
9	33
10	59
11	71
12	49
13	47
14	35
15	15
16	13
17	43
18	73
19	109
20	123
21	117
22	109
23	167
24	141
25	113
26	77
27	43
28	5
29	51
30	95
31	145
32	201
33	263
34	281
35	397
36	413
37	317
38	333
39	269
40	239
41	183
42	121
43	63
44	11
45	81
46	147
47	219
48	307
49	379
50	471
51	567
52	623
53	517
54	569
55	683
56	503
57	545
58	473
59	395
60	311

n	a(n)
1	1
2	3
3	11
4	15
5	13
6	9
7	5
8	21
9	33
10	59
11	71
12	49
13	47
14	35
15	15
16	13
17	43
18	73
19	109
20	123
21	117
22	109
23	167
24	141
25	113
26	77
27	43
28	5
29	51
30	95
31	145
32	201
33	263
34	281
35	397
36	413
37	317
38	333
39	269
40	239
41	183
42	121
43	63
44	11
45	81
46	147
47	219
48	307
49	379
50	471
51	567
52	623
53	517
54	569
55	683
56	503
57	545
58	473
59	395
60	311