A056944 - cp's OEIS frontend

A056944 Amount by which used area of rectangle needed to enclose a non-touching spiral of length n on a square lattice exceeds unused area.

n	a(n)
0	0
1	1
2	2
3	2
4	2
5	4
6	3
7	2
8	4
9	6
10	4
11	2
12	4
13	6
14	8
15	5
16	2
17	4
18	6
19	8
20	10
21	6
22	2
23	4
24	6
25	8
26	10
27	12
28	7
29	2
30	4
31	6
32	8
33	10
34	12
35	14
36	8
37	2
38	4
39	6
40	8
41	10
42	12
43	14
44	16
45	9
46	2
47	4
48	6
49	8
50	10
51	12
52	14
53	16
54	18
55	10
56	2
57	4
58	6
59	8
60	10
61	12
62	14
63	16
64	18
65	20
66	11
67	2
68	4
69	6
70	8
71	10
72	12
73	14
74	16
75	18
76	20
77	22
78	12
79	2
80	4
81	6
82	8
83	10
84	12
85	14
86	16

[0, 1, 2, 2, 2, 4, 3, 2, 4, 6, 4, 2, 4, 6, 8, 5, 2, 4, 6, 8, 10, 6, 2, 4, 6, 8, 10, 12, 7, 2, 4, 6, 8, 10, 12, 14, 8, 2, 4, 6, 8, 10, 12, 14, 16, 9, 2, 4, 6, 8, 10, 12, 14, 16, 18, 10, 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 11, 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 12, 2, 4, 6, 8, 10, 12, 14, 16]

cp's OEIS Frontend

A056944 Amount by which used area of rectangle needed to enclose a non-touching spiral of length n on a square lattice exceeds unused area.

Table of values

List of values

n	a(n)
0	0
1	1
2	2
3	2
4	2
5	4
6	3
7	2
8	4
9	6
10	4
11	2
12	4
13	6
14	8
15	5
16	2
17	4
18	6
19	8
20	10
21	6
22	2
23	4
24	6
25	8
26	10
27	12
28	7
29	2
30	4
31	6
32	8
33	10
34	12
35	14
36	8
37	2
38	4
39	6
40	8
41	10
42	12
43	14
44	16
45	9
46	2
47	4
48	6
49	8
50	10
51	12
52	14
53	16
54	18
55	10
56	2
57	4
58	6
59	8
60	10
61	12
62	14
63	16
64	18
65	20
66	11
67	2
68	4
69	6
70	8
71	10
72	12
73	14
74	16
75	18
76	20
77	22
78	12
79	2
80	4
81	6
82	8
83	10
84	12
85	14
86	16

n	a(n)
0	0
1	1
2	2
3	2
4	2
5	4
6	3
7	2
8	4
9	6
10	4
11	2
12	4
13	6
14	8
15	5
16	2
17	4
18	6
19	8
20	10
21	6
22	2
23	4
24	6
25	8
26	10
27	12
28	7
29	2
30	4
31	6
32	8
33	10
34	12
35	14
36	8
37	2
38	4
39	6
40	8
41	10
42	12
43	14
44	16
45	9
46	2
47	4
48	6
49	8
50	10
51	12
52	14
53	16
54	18
55	10
56	2
57	4
58	6
59	8
60	10
61	12
62	14
63	16
64	18
65	20
66	11
67	2
68	4
69	6
70	8
71	10
72	12
73	14
74	16
75	18
76	20
77	22
78	12
79	2
80	4
81	6
82	8
83	10
84	12
85	14
86	16

n	a(n)
0	0
1	1
2	2
3	2
4	2
5	4
6	3
7	2
8	4
9	6
10	4
11	2
12	4
13	6
14	8
15	5
16	2
17	4
18	6
19	8
20	10
21	6
22	2
23	4
24	6
25	8
26	10
27	12
28	7
29	2
30	4
31	6
32	8
33	10
34	12
35	14
36	8
37	2
38	4
39	6
40	8
41	10
42	12
43	14
44	16
45	9
46	2
47	4
48	6
49	8
50	10
51	12
52	14
53	16
54	18
55	10
56	2
57	4
58	6
59	8
60	10
61	12
62	14
63	16
64	18
65	20
66	11
67	2
68	4
69	6
70	8
71	10
72	12
73	14
74	16
75	18
76	20
77	22
78	12
79	2
80	4
81	6
82	8
83	10
84	12
85	14
86	16