A296241 - cp's OEIS frontend

A296241 Finite number of units in a commutative ring; nonnegative even numbers together with products of Mersenne numbers.

n	a(n)
1	0
2	1
3	2
4	3
5	4
6	6
7	7
8	8
9	9
10	10
11	12
12	14
13	15
14	16
15	18
16	20
17	21
18	22
19	24
20	26
21	27
22	28
23	30
24	31
25	32
26	34
27	36
28	38
29	40
30	42
31	44
32	45
33	46
34	48
35	49
36	50
37	52
38	54
39	56
40	58
41	60
42	62
43	63
44	64
45	66
46	68
47	70
48	72
49	74
50	76
51	78
52	80
53	81
54	82
55	84
56	86
57	88
58	90
59	92
60	93
61	94
62	96
63	98
64	100
65	102
66	104
67	105
68	106
69	108
70	110
71	112
72	114
73	116
74	118
75	120
76	122
77	124
78	126

[0, 1, 2, 3, 4, 6, 7, 8, 9, 10, 12, 14, 15, 16, 18, 20, 21, 22, 24, 26, 27, 28, 30, 31, 32, 34, 36, 38, 40, 42, 44, 45, 46, 48, 49, 50, 52, 54, 56, 58, 60, 62, 63, 64, 66, 68, 70, 72, 74, 76, 78, 80, 81, 82, 84, 86, 88, 90, 92, 93, 94, 96, 98, 100, 102, 104, 105, 106, 108, 110, 112, 114, 116, 118, 120, 122, 124, 126]

cp's OEIS Frontend

A296241 Finite number of units in a commutative ring; nonnegative even numbers together with products of Mersenne numbers.

Table of values

List of values

n	a(n)
1	0
2	1
3	2
4	3
5	4
6	6
7	7
8	8
9	9
10	10
11	12
12	14
13	15
14	16
15	18
16	20
17	21
18	22
19	24
20	26
21	27
22	28
23	30
24	31
25	32
26	34
27	36
28	38
29	40
30	42
31	44
32	45
33	46
34	48
35	49
36	50
37	52
38	54
39	56
40	58
41	60
42	62
43	63
44	64
45	66
46	68
47	70
48	72
49	74
50	76
51	78
52	80
53	81
54	82
55	84
56	86
57	88
58	90
59	92
60	93
61	94
62	96
63	98
64	100
65	102
66	104
67	105
68	106
69	108
70	110
71	112
72	114
73	116
74	118
75	120
76	122
77	124
78	126

n	a(n)
1	0
2	1
3	2
4	3
5	4
6	6
7	7
8	8
9	9
10	10
11	12
12	14
13	15
14	16
15	18
16	20
17	21
18	22
19	24
20	26
21	27
22	28
23	30
24	31
25	32
26	34
27	36
28	38
29	40
30	42
31	44
32	45
33	46
34	48
35	49
36	50
37	52
38	54
39	56
40	58
41	60
42	62
43	63
44	64
45	66
46	68
47	70
48	72
49	74
50	76
51	78
52	80
53	81
54	82
55	84
56	86
57	88
58	90
59	92
60	93
61	94
62	96
63	98
64	100
65	102
66	104
67	105
68	106
69	108
70	110
71	112
72	114
73	116
74	118
75	120
76	122
77	124
78	126

n	a(n)
1	0
2	1
3	2
4	3
5	4
6	6
7	7
8	8
9	9
10	10
11	12
12	14
13	15
14	16
15	18
16	20
17	21
18	22
19	24
20	26
21	27
22	28
23	30
24	31
25	32
26	34
27	36
28	38
29	40
30	42
31	44
32	45
33	46
34	48
35	49
36	50
37	52
38	54
39	56
40	58
41	60
42	62
43	63
44	64
45	66
46	68
47	70
48	72
49	74
50	76
51	78
52	80
53	81
54	82
55	84
56	86
57	88
58	90
59	92
60	93
61	94
62	96
63	98
64	100
65	102
66	104
67	105
68	106
69	108
70	110
71	112
72	114
73	116
74	118
75	120
76	122
77	124
78	126