A319879 - cp's OEIS frontend

A319879 a(n) = minimal number m of unit squares needed to make an figure formed from squares (joined edge to edge) which has n holes.

n	a(n)
0	1
1	8
2	13
3	18
4	21
5	26
6	29
7	34
8	37
9	40
10	45
11	48
12	51
13	56
14	59
15	62
16	65
17	70
18	73
19	76
20	79
21	84
22	87
23	90
24	93
25	96
26	101
27	104
28	107
29	110
30	113
31	118
32	121
33	124
34	127
35	130
36	133
37	138
38	141
39	144
40	147
41	150
42	153
43	158
44	161
45	164
46	167
47	170
48	173
49	176
50	181

[1, 8, 13, 18, 21, 26, 29, 34, 37, 40, 45, 48, 51, 56, 59, 62, 65, 70, 73, 76, 79, 84, 87, 90, 93, 96, 101, 104, 107, 110, 113, 118, 121, 124, 127, 130, 133, 138, 141, 144, 147, 150, 153, 158, 161, 164, 167, 170, 173, 176, 181]

cp's OEIS Frontend

A319879 a(n) = minimal number m of unit squares needed to make an figure formed from squares (joined edge to edge) which has n holes.

Table of values

List of values

n	a(n)
0	1
1	8
2	13
3	18
4	21
5	26
6	29
7	34
8	37
9	40
10	45
11	48
12	51
13	56
14	59
15	62
16	65
17	70
18	73
19	76
20	79
21	84
22	87
23	90
24	93
25	96
26	101
27	104
28	107
29	110
30	113
31	118
32	121
33	124
34	127
35	130
36	133
37	138
38	141
39	144
40	147
41	150
42	153
43	158
44	161
45	164
46	167
47	170
48	173
49	176
50	181

n	a(n)
0	1
1	8
2	13
3	18
4	21
5	26
6	29
7	34
8	37
9	40
10	45
11	48
12	51
13	56
14	59
15	62
16	65
17	70
18	73
19	76
20	79
21	84
22	87
23	90
24	93
25	96
26	101
27	104
28	107
29	110
30	113
31	118
32	121
33	124
34	127
35	130
36	133
37	138
38	141
39	144
40	147
41	150
42	153
43	158
44	161
45	164
46	167
47	170
48	173
49	176
50	181

n	a(n)
0	1
1	8
2	13
3	18
4	21
5	26
6	29
7	34
8	37
9	40
10	45
11	48
12	51
13	56
14	59
15	62
16	65
17	70
18	73
19	76
20	79
21	84
22	87
23	90
24	93
25	96
26	101
27	104
28	107
29	110
30	113
31	118
32	121
33	124
34	127
35	130
36	133
37	138
38	141
39	144
40	147
41	150
42	153
43	158
44	161
45	164
46	167
47	170
48	173
49	176
50	181