A086076 - cp's OEIS frontend

A086076 Number of 5's in decimal expansion of triangular number n(n+1)/2.

n	a(n)
0	0
1	0
2	0
3	0
4	0
5	1
6	0
7	0
8	0
9	1
10	2
11	0
12	0
13	0
14	1
15	0
16	0
17	1
18	0
19	0
20	0
21	0
22	1
23	0
24	0
25	1
26	1
27	0
28	0
29	1
30	1
31	0
32	1
33	1
34	2
35	0
36	0
37	0
38	0
39	0
40	0
41	0
42	0
43	0
44	0
45	1
46	0
47	0
48	0
49	1
50	1
51	0
52	0
53	0
54	1
55	1
56	1
57	1
58	0
59	0
60	0
61	0
62	1
63	0
64	0
65	1
66	0
67	0
68	0
69	1
70	1
71	2
72	0
73	0
74	1
75	1
76	0
77	0
78	0
79	0
80	0
81	0
82	0
83	0
84	1
85	2
86	0
87	0
88	0
89	1
90	1
91	0
92	0
93	0
94	1
95	1
96	1
97	1
98	1
99	1
100	2
101	2
102	2
103	2
104	1

[0, 0, 0, 0, 0, 1, 0, 0, 0, 1, 2, 0, 0, 0, 1, 0, 0, 1, 0, 0, 0, 0, 1, 0, 0, 1, 1, 0, 0, 1, 1, 0, 1, 1, 2, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 1, 1, 0, 0, 0, 1, 1, 1, 1, 0, 0, 0, 0, 1, 0, 0, 1, 0, 0, 0, 1, 1, 2, 0, 0, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 1, 2, 0, 0, 0, 1, 1, 0, 0, 0, 1, 1, 1, 1, 1, 1, 2, 2, 2, 2, 1]

cp's OEIS Frontend

A086076 Number of 5's in decimal expansion of triangular number n(n+1)/2.

Table of values

List of values

n	a(n)
0	0
1	0
2	0
3	0
4	0
5	1
6	0
7	0
8	0
9	1
10	2
11	0
12	0
13	0
14	1
15	0
16	0
17	1
18	0
19	0
20	0
21	0
22	1
23	0
24	0
25	1
26	1
27	0
28	0
29	1
30	1
31	0
32	1
33	1
34	2
35	0
36	0
37	0
38	0
39	0
40	0
41	0
42	0
43	0
44	0
45	1
46	0
47	0
48	0
49	1
50	1
51	0
52	0
53	0
54	1
55	1
56	1
57	1
58	0
59	0
60	0
61	0
62	1
63	0
64	0
65	1
66	0
67	0
68	0
69	1
70	1
71	2
72	0
73	0
74	1
75	1
76	0
77	0
78	0
79	0
80	0
81	0
82	0
83	0
84	1
85	2
86	0
87	0
88	0
89	1
90	1
91	0
92	0
93	0
94	1
95	1
96	1
97	1
98	1
99	1
100	2
101	2
102	2
103	2
104	1

n	a(n)
0	0
1	0
2	0
3	0
4	0
5	1
6	0
7	0
8	0
9	1
10	2
11	0
12	0
13	0
14	1
15	0
16	0
17	1
18	0
19	0
20	0
21	0
22	1
23	0
24	0
25	1
26	1
27	0
28	0
29	1
30	1
31	0
32	1
33	1
34	2
35	0
36	0
37	0
38	0
39	0
40	0
41	0
42	0
43	0
44	0
45	1
46	0
47	0
48	0
49	1
50	1
51	0
52	0
53	0
54	1
55	1
56	1
57	1
58	0
59	0
60	0
61	0
62	1
63	0
64	0
65	1
66	0
67	0
68	0
69	1
70	1
71	2
72	0
73	0
74	1
75	1
76	0
77	0
78	0
79	0
80	0
81	0
82	0
83	0
84	1
85	2
86	0
87	0
88	0
89	1
90	1
91	0
92	0
93	0
94	1
95	1
96	1
97	1
98	1
99	1
100	2
101	2
102	2
103	2
104	1

n	a(n)
0	0
1	0
2	0
3	0
4	0
5	1
6	0
7	0
8	0
9	1
10	2
11	0
12	0
13	0
14	1
15	0
16	0
17	1
18	0
19	0
20	0
21	0
22	1
23	0
24	0
25	1
26	1
27	0
28	0
29	1
30	1
31	0
32	1
33	1
34	2
35	0
36	0
37	0
38	0
39	0
40	0
41	0
42	0
43	0
44	0
45	1
46	0
47	0
48	0
49	1
50	1
51	0
52	0
53	0
54	1
55	1
56	1
57	1
58	0
59	0
60	0
61	0
62	1
63	0
64	0
65	1
66	0
67	0
68	0
69	1
70	1
71	2
72	0
73	0
74	1
75	1
76	0
77	0
78	0
79	0
80	0
81	0
82	0
83	0
84	1
85	2
86	0
87	0
88	0
89	1
90	1
91	0
92	0
93	0
94	1
95	1
96	1
97	1
98	1
99	1
100	2
101	2
102	2
103	2
104	1