A005870 - cp's OEIS frontend

A005870 Numbers represented by hexagonal close-packing.

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

[0, 3, 6, 8, 9, 11, 12, 15, 17, 18, 19, 20, 21, 22, 25, 27, 29, 30, 31, 32, 33, 34, 35, 36, 37, 39, 41, 43, 44, 45, 46, 47, 48, 49, 51, 53, 54, 55, 56, 57, 59, 61, 63, 65, 66, 67, 68, 69, 70, 71, 72, 75]

cp's OEIS Frontend

A005870 Numbers represented by hexagonal close-packing.

Table of values

List of values

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

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

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