A331460 - cp's OEIS frontend

A331460 Irregular triangle read by rows in which row n is the result of iterating the operation f(n) = n/7 if n == 0 (mod 7), otherwise f(n) = 7*(n + ceiling(n/7)), terminating at the first occurrence of 1.

n	a(n)
1	1
2	2
3	21
4	3
5	28
6	4
7	35
8	5
9	42
10	6
11	49
12	7
13	1
14	3
15	28
16	4
17	35
18	5
19	42
20	6
21	49
22	7
23	1
24	4
25	35
26	5
27	42
28	6
29	49
30	7
31	1
32	5
33	42
34	6
35	49
36	7
37	1
38	6
39	49
40	7
41	1
42	7
43	1
44	8
45	70
46	10
47	84
48	12
49	98
50	14
51	2
52	21
53	3
54	28
55	4
56	35
57	5
58	42
59	6
60	49
61	7
62	1
63	9
64	77
65	11
66	91
67	13
68	105
69	15
70	126
71	18

[1, 2, 21, 3, 28, 4, 35, 5, 42, 6, 49, 7, 1, 3, 28, 4, 35, 5, 42, 6, 49, 7, 1, 4, 35, 5, 42, 6, 49, 7, 1, 5, 42, 6, 49, 7, 1, 6, 49, 7, 1, 7, 1, 8, 70, 10, 84, 12, 98, 14, 2, 21, 3, 28, 4, 35, 5, 42, 6, 49, 7, 1, 9, 77, 11, 91, 13, 105, 15, 126, 18]

cp's OEIS Frontend

A331460 Irregular triangle read by rows in which row n is the result of iterating the operation f(n) = n/7 if n == 0 (mod 7), otherwise f(n) = 7*(n + ceiling(n/7)), terminating at the first occurrence of 1.

Table of values

List of values

n	a(n)
1	1
2	2
3	21
4	3
5	28
6	4
7	35
8	5
9	42
10	6
11	49
12	7
13	1
14	3
15	28
16	4
17	35
18	5
19	42
20	6
21	49
22	7
23	1
24	4
25	35
26	5
27	42
28	6
29	49
30	7
31	1
32	5
33	42
34	6
35	49
36	7
37	1
38	6
39	49
40	7
41	1
42	7
43	1
44	8
45	70
46	10
47	84
48	12
49	98
50	14
51	2
52	21
53	3
54	28
55	4
56	35
57	5
58	42
59	6
60	49
61	7
62	1
63	9
64	77
65	11
66	91
67	13
68	105
69	15
70	126
71	18

n	a(n)
1	1
2	2
3	21
4	3
5	28
6	4
7	35
8	5
9	42
10	6
11	49
12	7
13	1
14	3
15	28
16	4
17	35
18	5
19	42
20	6
21	49
22	7
23	1
24	4
25	35
26	5
27	42
28	6
29	49
30	7
31	1
32	5
33	42
34	6
35	49
36	7
37	1
38	6
39	49
40	7
41	1
42	7
43	1
44	8
45	70
46	10
47	84
48	12
49	98
50	14
51	2
52	21
53	3
54	28
55	4
56	35
57	5
58	42
59	6
60	49
61	7
62	1
63	9
64	77
65	11
66	91
67	13
68	105
69	15
70	126
71	18

n	a(n)
1	1
2	2
3	21
4	3
5	28
6	4
7	35
8	5
9	42
10	6
11	49
12	7
13	1
14	3
15	28
16	4
17	35
18	5
19	42
20	6
21	49
22	7
23	1
24	4
25	35
26	5
27	42
28	6
29	49
30	7
31	1
32	5
33	42
34	6
35	49
36	7
37	1
38	6
39	49
40	7
41	1
42	7
43	1
44	8
45	70
46	10
47	84
48	12
49	98
50	14
51	2
52	21
53	3
54	28
55	4
56	35
57	5
58	42
59	6
60	49
61	7
62	1
63	9
64	77
65	11
66	91
67	13
68	105
69	15
70	126
71	18