A072561 - cp's OEIS frontend

A072561 Denominators of w(n) equals 3 where w(1)=w(2)=w(3)=1, w(n)=(w(n-1)*w(n-2)+(w(n-1)+w(n-2))/3) / w(n-3).

n	a(n)
1	1
2	3
3	4
4	6
5	7
6	9
7	10
8	12
9	13
10	15
11	19
12	21
13	22
14	24
15	25
16	27
17	28
18	30
19	31
20	33
21	37
22	39
23	40
24	42
25	43
26	45
27	46
28	48
29	49
30	51
31	55
32	57
33	58
34	60
35	61
36	63
37	64
38	66
39	67
40	69
41	73
42	75
43	76
44	78
45	79
46	81
47	82
48	84
49	85
50	87
51	91
52	93
53	94
54	96
55	97
56	99
57	100
58	102
59	103
60	105
61	109
62	111
63	112
64	114
65	115
66	117
67	118

[1, 3, 4, 6, 7, 9, 10, 12, 13, 15, 19, 21, 22, 24, 25, 27, 28, 30, 31, 33, 37, 39, 40, 42, 43, 45, 46, 48, 49, 51, 55, 57, 58, 60, 61, 63, 64, 66, 67, 69, 73, 75, 76, 78, 79, 81, 82, 84, 85, 87, 91, 93, 94, 96, 97, 99, 100, 102, 103, 105, 109, 111, 112, 114, 115, 117, 118]

cp's OEIS Frontend

A072561 Denominators of w(n) equals 3 where w(1)=w(2)=w(3)=1, w(n)=(w(n-1)*w(n-2)+(w(n-1)+w(n-2))/3) / w(n-3).

Table of values

List of values

n	a(n)
1	1
2	3
3	4
4	6
5	7
6	9
7	10
8	12
9	13
10	15
11	19
12	21
13	22
14	24
15	25
16	27
17	28
18	30
19	31
20	33
21	37
22	39
23	40
24	42
25	43
26	45
27	46
28	48
29	49
30	51
31	55
32	57
33	58
34	60
35	61
36	63
37	64
38	66
39	67
40	69
41	73
42	75
43	76
44	78
45	79
46	81
47	82
48	84
49	85
50	87
51	91
52	93
53	94
54	96
55	97
56	99
57	100
58	102
59	103
60	105
61	109
62	111
63	112
64	114
65	115
66	117
67	118

n	a(n)
1	1
2	3
3	4
4	6
5	7
6	9
7	10
8	12
9	13
10	15
11	19
12	21
13	22
14	24
15	25
16	27
17	28
18	30
19	31
20	33
21	37
22	39
23	40
24	42
25	43
26	45
27	46
28	48
29	49
30	51
31	55
32	57
33	58
34	60
35	61
36	63
37	64
38	66
39	67
40	69
41	73
42	75
43	76
44	78
45	79
46	81
47	82
48	84
49	85
50	87
51	91
52	93
53	94
54	96
55	97
56	99
57	100
58	102
59	103
60	105
61	109
62	111
63	112
64	114
65	115
66	117
67	118

n	a(n)
1	1
2	3
3	4
4	6
5	7
6	9
7	10
8	12
9	13
10	15
11	19
12	21
13	22
14	24
15	25
16	27
17	28
18	30
19	31
20	33
21	37
22	39
23	40
24	42
25	43
26	45
27	46
28	48
29	49
30	51
31	55
32	57
33	58
34	60
35	61
36	63
37	64
38	66
39	67
40	69
41	73
42	75
43	76
44	78
45	79
46	81
47	82
48	84
49	85
50	87
51	91
52	93
53	94
54	96
55	97
56	99
57	100
58	102
59	103
60	105
61	109
62	111
63	112
64	114
65	115
66	117
67	118