A325722 - cp's OEIS frontend

A325722 Start the sequence with a(1) = 1 and read the digits one by one from there. The sequence is always extended with the product d*k, d being the digit read and k the number of d digits present up to the point of the d digit taken.

n	a(n)
1	1
2	1
3	2
4	2
5	4
6	4
7	8
8	8
9	16
10	3
11	6
12	3
13	12
14	6
15	4
16	6
17	18
18	12
19	24
20	5
21	24
22	6
23	8
24	10
25	16
26	5
27	12
28	20
29	30
30	32
31	7
32	0
33	8
34	36
35	10
36	9
37	14
38	16
39	0
40	9
41	0
42	12
43	18
44	7
45	0
46	40
47	15
48	42
49	10
50	0
51	9
52	11
53	24
54	12
55	48
56	0
57	18
58	0
59	13
60	20
61	14
62	48
63	14
64	0
65	28
66	0
67	15
68	15
69	32
70	22
71	16
72	0
73	0
74	27
75	17
76	18
77	24
78	36
79	19
80	26
81	40
82	56
83	0
84	20
85	64
86	0
87	21
88	18
89	28
90	0
91	22
92	44
93	48
94	72

[1, 1, 2, 2, 4, 4, 8, 8, 16, 3, 6, 3, 12, 6, 4, 6, 18, 12, 24, 5, 24, 6, 8, 10, 16, 5, 12, 20, 30, 32, 7, 0, 8, 36, 10, 9, 14, 16, 0, 9, 0, 12, 18, 7, 0, 40, 15, 42, 10, 0, 9, 11, 24, 12, 48, 0, 18, 0, 13, 20, 14, 48, 14, 0, 28, 0, 15, 15, 32, 22, 16, 0, 0, 27, 17, 18, 24, 36, 19, 26, 40, 56, 0, 20, 64, 0, 21, 18, 28, 0, 22, 44, 48, 72]

cp's OEIS Frontend

A325722 Start the sequence with a(1) = 1 and read the digits one by one from there. The sequence is always extended with the product d*k, d being the digit read and k the number of d digits present up to the point of the d digit taken.

Table of values

List of values

n	a(n)
1	1
2	1
3	2
4	2
5	4
6	4
7	8
8	8
9	16
10	3
11	6
12	3
13	12
14	6
15	4
16	6
17	18
18	12
19	24
20	5
21	24
22	6
23	8
24	10
25	16
26	5
27	12
28	20
29	30
30	32
31	7
32	0
33	8
34	36
35	10
36	9
37	14
38	16
39	0
40	9
41	0
42	12
43	18
44	7
45	0
46	40
47	15
48	42
49	10
50	0
51	9
52	11
53	24
54	12
55	48
56	0
57	18
58	0
59	13
60	20
61	14
62	48
63	14
64	0
65	28
66	0
67	15
68	15
69	32
70	22
71	16
72	0
73	0
74	27
75	17
76	18
77	24
78	36
79	19
80	26
81	40
82	56
83	0
84	20
85	64
86	0
87	21
88	18
89	28
90	0
91	22
92	44
93	48
94	72

n	a(n)
1	1
2	1
3	2
4	2
5	4
6	4
7	8
8	8
9	16
10	3
11	6
12	3
13	12
14	6
15	4
16	6
17	18
18	12
19	24
20	5
21	24
22	6
23	8
24	10
25	16
26	5
27	12
28	20
29	30
30	32
31	7
32	0
33	8
34	36
35	10
36	9
37	14
38	16
39	0
40	9
41	0
42	12
43	18
44	7
45	0
46	40
47	15
48	42
49	10
50	0
51	9
52	11
53	24
54	12
55	48
56	0
57	18
58	0
59	13
60	20
61	14
62	48
63	14
64	0
65	28
66	0
67	15
68	15
69	32
70	22
71	16
72	0
73	0
74	27
75	17
76	18
77	24
78	36
79	19
80	26
81	40
82	56
83	0
84	20
85	64
86	0
87	21
88	18
89	28
90	0
91	22
92	44
93	48
94	72

n	a(n)
1	1
2	1
3	2
4	2
5	4
6	4
7	8
8	8
9	16
10	3
11	6
12	3
13	12
14	6
15	4
16	6
17	18
18	12
19	24
20	5
21	24
22	6
23	8
24	10
25	16
26	5
27	12
28	20
29	30
30	32
31	7
32	0
33	8
34	36
35	10
36	9
37	14
38	16
39	0
40	9
41	0
42	12
43	18
44	7
45	0
46	40
47	15
48	42
49	10
50	0
51	9
52	11
53	24
54	12
55	48
56	0
57	18
58	0
59	13
60	20
61	14
62	48
63	14
64	0
65	28
66	0
67	15
68	15
69	32
70	22
71	16
72	0
73	0
74	27
75	17
76	18
77	24
78	36
79	19
80	26
81	40
82	56
83	0
84	20
85	64
86	0
87	21
88	18
89	28
90	0
91	22
92	44
93	48
94	72