A257684 - cp's OEIS frontend

A257684 Discard the rightmost digit from the factorial base representation of n and subtract one from all remaining nonzero digits, then convert back to decimal.

n	a(n)
0	0
1	0
2	0
3	0
4	1
5	1
6	0
7	0
8	0
9	0
10	1
11	1
12	2
13	2
14	2
15	2
16	3
17	3
18	4
19	4
20	4
21	4
22	5
23	5
24	0
25	0
26	0
27	0
28	1
29	1
30	0
31	0
32	0
33	0
34	1
35	1
36	2
37	2
38	2
39	2
40	3
41	3
42	4
43	4
44	4
45	4
46	5
47	5
48	6
49	6
50	6
51	6
52	7
53	7
54	6
55	6
56	6
57	6
58	7
59	7
60	8
61	8
62	8
63	8
64	9
65	9
66	10
67	10
68	10
69	10
70	11
71	11
72	12
73	12
74	12
75	12
76	13
77	13
78	12
79	12
80	12
81	12
82	13
83	13
84	14
85	14
86	14
87	14
88	15
89	15
90	16
91	16
92	16
93	16
94	17
95	17

[0, 0, 0, 0, 1, 1, 0, 0, 0, 0, 1, 1, 2, 2, 2, 2, 3, 3, 4, 4, 4, 4, 5, 5, 0, 0, 0, 0, 1, 1, 0, 0, 0, 0, 1, 1, 2, 2, 2, 2, 3, 3, 4, 4, 4, 4, 5, 5, 6, 6, 6, 6, 7, 7, 6, 6, 6, 6, 7, 7, 8, 8, 8, 8, 9, 9, 10, 10, 10, 10, 11, 11, 12, 12, 12, 12, 13, 13, 12, 12, 12, 12, 13, 13, 14, 14, 14, 14, 15, 15, 16, 16, 16, 16, 17, 17]

cp's OEIS Frontend

A257684 Discard the rightmost digit from the factorial base representation of n and subtract one from all remaining nonzero digits, then convert back to decimal.

Table of values

List of values

n	a(n)
0	0
1	0
2	0
3	0
4	1
5	1
6	0
7	0
8	0
9	0
10	1
11	1
12	2
13	2
14	2
15	2
16	3
17	3
18	4
19	4
20	4
21	4
22	5
23	5
24	0
25	0
26	0
27	0
28	1
29	1
30	0
31	0
32	0
33	0
34	1
35	1
36	2
37	2
38	2
39	2
40	3
41	3
42	4
43	4
44	4
45	4
46	5
47	5
48	6
49	6
50	6
51	6
52	7
53	7
54	6
55	6
56	6
57	6
58	7
59	7
60	8
61	8
62	8
63	8
64	9
65	9
66	10
67	10
68	10
69	10
70	11
71	11
72	12
73	12
74	12
75	12
76	13
77	13
78	12
79	12
80	12
81	12
82	13
83	13
84	14
85	14
86	14
87	14
88	15
89	15
90	16
91	16
92	16
93	16
94	17
95	17

n	a(n)
0	0
1	0
2	0
3	0
4	1
5	1
6	0
7	0
8	0
9	0
10	1
11	1
12	2
13	2
14	2
15	2
16	3
17	3
18	4
19	4
20	4
21	4
22	5
23	5
24	0
25	0
26	0
27	0
28	1
29	1
30	0
31	0
32	0
33	0
34	1
35	1
36	2
37	2
38	2
39	2
40	3
41	3
42	4
43	4
44	4
45	4
46	5
47	5
48	6
49	6
50	6
51	6
52	7
53	7
54	6
55	6
56	6
57	6
58	7
59	7
60	8
61	8
62	8
63	8
64	9
65	9
66	10
67	10
68	10
69	10
70	11
71	11
72	12
73	12
74	12
75	12
76	13
77	13
78	12
79	12
80	12
81	12
82	13
83	13
84	14
85	14
86	14
87	14
88	15
89	15
90	16
91	16
92	16
93	16
94	17
95	17

n	a(n)
0	0
1	0
2	0
3	0
4	1
5	1
6	0
7	0
8	0
9	0
10	1
11	1
12	2
13	2
14	2
15	2
16	3
17	3
18	4
19	4
20	4
21	4
22	5
23	5
24	0
25	0
26	0
27	0
28	1
29	1
30	0
31	0
32	0
33	0
34	1
35	1
36	2
37	2
38	2
39	2
40	3
41	3
42	4
43	4
44	4
45	4
46	5
47	5
48	6
49	6
50	6
51	6
52	7
53	7
54	6
55	6
56	6
57	6
58	7
59	7
60	8
61	8
62	8
63	8
64	9
65	9
66	10
67	10
68	10
69	10
70	11
71	11
72	12
73	12
74	12
75	12
76	13
77	13
78	12
79	12
80	12
81	12
82	13
83	13
84	14
85	14
86	14
87	14
88	15
89	15
90	16
91	16
92	16
93	16
94	17
95	17