A353109 - cp's OEIS frontend

A353109 Array read by antidiagonals: A(n, k) is the digital root of n*k with n >= 0 and k >= 0.

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

[0, 0, 0, 0, 1, 0, 0, 2, 2, 0, 0, 3, 4, 3, 0, 0, 4, 6, 6, 4, 0, 0, 5, 8, 9, 8, 5, 0, 0, 6, 1, 3, 3, 1, 6, 0, 0, 7, 3, 6, 7, 6, 3, 7, 0, 0, 8, 5, 9, 2, 2, 9, 5, 8, 0, 0, 9, 7, 3, 6, 7, 6, 3, 7, 9, 0, 0, 1, 9, 6, 1, 3, 3, 1, 6, 9, 1, 0, 0, 2, 2, 9, 5, 8, 9, 8, 5, 9, 2, 2, 0]

cp's OEIS Frontend

A353109 Array read by antidiagonals: A(n, k) is the digital root of n*k with n >= 0 and k >= 0.

Table of values

List of values

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

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

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