A328622 - cp's OEIS frontend

A328622 In primorial base representation of n, multiply by 2 all other digits except the least significant, and reduce each such product modulo prime(k) (to get the new digit), where k > 1 is the position of the digit, then convert back to decimal.

n	a(n)
0	0
1	1
2	4
3	5
4	2
5	3
6	12
7	13
8	16
9	17
10	14
11	15
12	24
13	25
14	28
15	29
16	26
17	27
18	6
19	7
20	10
21	11
22	8
23	9
24	18
25	19
26	22
27	23
28	20
29	21
30	60
31	61
32	64
33	65
34	62
35	63
36	72
37	73
38	76
39	77
40	74
41	75
42	84
43	85
44	88
45	89
46	86
47	87
48	66
49	67
50	70
51	71
52	68
53	69
54	78
55	79
56	82
57	83
58	80
59	81
60	120
61	121
62	124
63	125
64	122
65	123
66	132
67	133
68	136
69	137
70	134
71	135
72	144
73	145
74	148
75	149
76	146
77	147
78	126
79	127
80	130
81	131

[0, 1, 4, 5, 2, 3, 12, 13, 16, 17, 14, 15, 24, 25, 28, 29, 26, 27, 6, 7, 10, 11, 8, 9, 18, 19, 22, 23, 20, 21, 60, 61, 64, 65, 62, 63, 72, 73, 76, 77, 74, 75, 84, 85, 88, 89, 86, 87, 66, 67, 70, 71, 68, 69, 78, 79, 82, 83, 80, 81, 120, 121, 124, 125, 122, 123, 132, 133, 136, 137, 134, 135, 144, 145, 148, 149, 146, 147, 126, 127, 130, 131]

cp's OEIS Frontend

A328622 In primorial base representation of n, multiply by 2 all other digits except the least significant, and reduce each such product modulo prime(k) (to get the new digit), where k > 1 is the position of the digit, then convert back to decimal.

Table of values

List of values

n	a(n)
0	0
1	1
2	4
3	5
4	2
5	3
6	12
7	13
8	16
9	17
10	14
11	15
12	24
13	25
14	28
15	29
16	26
17	27
18	6
19	7
20	10
21	11
22	8
23	9
24	18
25	19
26	22
27	23
28	20
29	21
30	60
31	61
32	64
33	65
34	62
35	63
36	72
37	73
38	76
39	77
40	74
41	75
42	84
43	85
44	88
45	89
46	86
47	87
48	66
49	67
50	70
51	71
52	68
53	69
54	78
55	79
56	82
57	83
58	80
59	81
60	120
61	121
62	124
63	125
64	122
65	123
66	132
67	133
68	136
69	137
70	134
71	135
72	144
73	145
74	148
75	149
76	146
77	147
78	126
79	127
80	130
81	131

n	a(n)
0	0
1	1
2	4
3	5
4	2
5	3
6	12
7	13
8	16
9	17
10	14
11	15
12	24
13	25
14	28
15	29
16	26
17	27
18	6
19	7
20	10
21	11
22	8
23	9
24	18
25	19
26	22
27	23
28	20
29	21
30	60
31	61
32	64
33	65
34	62
35	63
36	72
37	73
38	76
39	77
40	74
41	75
42	84
43	85
44	88
45	89
46	86
47	87
48	66
49	67
50	70
51	71
52	68
53	69
54	78
55	79
56	82
57	83
58	80
59	81
60	120
61	121
62	124
63	125
64	122
65	123
66	132
67	133
68	136
69	137
70	134
71	135
72	144
73	145
74	148
75	149
76	146
77	147
78	126
79	127
80	130
81	131

n	a(n)
0	0
1	1
2	4
3	5
4	2
5	3
6	12
7	13
8	16
9	17
10	14
11	15
12	24
13	25
14	28
15	29
16	26
17	27
18	6
19	7
20	10
21	11
22	8
23	9
24	18
25	19
26	22
27	23
28	20
29	21
30	60
31	61
32	64
33	65
34	62
35	63
36	72
37	73
38	76
39	77
40	74
41	75
42	84
43	85
44	88
45	89
46	86
47	87
48	66
49	67
50	70
51	71
52	68
53	69
54	78
55	79
56	82
57	83
58	80
59	81
60	120
61	121
62	124
63	125
64	122
65	123
66	132
67	133
68	136
69	137
70	134
71	135
72	144
73	145
74	148
75	149
76	146
77	147
78	126
79	127
80	130
81	131