A214587 - cp's OEIS frontend

A214587 Greatest common divisor of a number and its last decimal digit: a(n) = gcd(n, n mod 10).

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

[0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 1, 2, 1, 2, 5, 2, 1, 2, 1, 20, 1, 2, 1, 4, 5, 2, 1, 4, 1, 30, 1, 2, 3, 2, 5, 6, 1, 2, 3, 40, 1, 2, 1, 4, 5, 2, 1, 8, 1, 50, 1, 2, 1, 2, 5, 2, 1, 2, 1, 60, 1, 2, 3, 4, 5, 6, 1, 4, 3, 70, 1, 2, 1, 2, 5, 2, 7, 2, 1, 80, 1, 2, 1, 4, 5]

cp's OEIS Frontend

A214587 Greatest common divisor of a number and its last decimal digit: a(n) = gcd(n, n mod 10).

Table of values

List of values

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

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

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