A084248 - cp's OEIS frontend

A084248 Decimal expansion of c = Product_{k>=1} (1 + 1/t(k)) where t(k) = k(k+1)/2 is the k-th triangular number.

n	a(n)
1	5
2	0
3	7
4	9
5	2
6	2
7	0
8	2
9	0
10	8
11	6
12	6
13	3
14	6
15	7
16	8
17	3
18	3
19	6
20	0
21	4
22	3
23	6
24	8
25	7
26	9
27	5
28	6
29	7
30	8
31	2
32	0
33	2
34	1
35	0
36	7
37	4
38	8
39	3
40	2
41	3
42	9
43	7
44	3
45	4
46	5
47	7
48	0
49	8
50	3
51	5
52	9
53	7
54	7
55	4
56	2
57	8
58	4
59	8
60	2
61	4
62	3
63	7
64	9
65	1
66	6
67	8
68	7
69	4
70	5
71	9
72	0
73	9
74	3
75	2
76	9
77	1
78	9
79	9
80	0
81	6
82	9
83	4
84	7
85	0
86	1
87	5
88	4
89	5
90	4
91	9
92	0
93	2
94	3
95	3
96	4
97	9
98	0
99	3
100	6
101	1
102	0
103	2
104	8
105	8

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

cp's OEIS Frontend

A084248 Decimal expansion of c = Product_{k>=1} (1 + 1/t(k)) where t(k) = k(k+1)/2 is the k-th triangular number.

Table of values

List of values

n	a(n)
1	5
2	0
3	7
4	9
5	2
6	2
7	0
8	2
9	0
10	8
11	6
12	6
13	3
14	6
15	7
16	8
17	3
18	3
19	6
20	0
21	4
22	3
23	6
24	8
25	7
26	9
27	5
28	6
29	7
30	8
31	2
32	0
33	2
34	1
35	0
36	7
37	4
38	8
39	3
40	2
41	3
42	9
43	7
44	3
45	4
46	5
47	7
48	0
49	8
50	3
51	5
52	9
53	7
54	7
55	4
56	2
57	8
58	4
59	8
60	2
61	4
62	3
63	7
64	9
65	1
66	6
67	8
68	7
69	4
70	5
71	9
72	0
73	9
74	3
75	2
76	9
77	1
78	9
79	9
80	0
81	6
82	9
83	4
84	7
85	0
86	1
87	5
88	4
89	5
90	4
91	9
92	0
93	2
94	3
95	3
96	4
97	9
98	0
99	3
100	6
101	1
102	0
103	2
104	8
105	8

n	a(n)
1	5
2	0
3	7
4	9
5	2
6	2
7	0
8	2
9	0
10	8
11	6
12	6
13	3
14	6
15	7
16	8
17	3
18	3
19	6
20	0
21	4
22	3
23	6
24	8
25	7
26	9
27	5
28	6
29	7
30	8
31	2
32	0
33	2
34	1
35	0
36	7
37	4
38	8
39	3
40	2
41	3
42	9
43	7
44	3
45	4
46	5
47	7
48	0
49	8
50	3
51	5
52	9
53	7
54	7
55	4
56	2
57	8
58	4
59	8
60	2
61	4
62	3
63	7
64	9
65	1
66	6
67	8
68	7
69	4
70	5
71	9
72	0
73	9
74	3
75	2
76	9
77	1
78	9
79	9
80	0
81	6
82	9
83	4
84	7
85	0
86	1
87	5
88	4
89	5
90	4
91	9
92	0
93	2
94	3
95	3
96	4
97	9
98	0
99	3
100	6
101	1
102	0
103	2
104	8
105	8

n	a(n)
1	5
2	0
3	7
4	9
5	2
6	2
7	0
8	2
9	0
10	8
11	6
12	6
13	3
14	6
15	7
16	8
17	3
18	3
19	6
20	0
21	4
22	3
23	6
24	8
25	7
26	9
27	5
28	6
29	7
30	8
31	2
32	0
33	2
34	1
35	0
36	7
37	4
38	8
39	3
40	2
41	3
42	9
43	7
44	3
45	4
46	5
47	7
48	0
49	8
50	3
51	5
52	9
53	7
54	7
55	4
56	2
57	8
58	4
59	8
60	2
61	4
62	3
63	7
64	9
65	1
66	6
67	8
68	7
69	4
70	5
71	9
72	0
73	9
74	3
75	2
76	9
77	1
78	9
79	9
80	0
81	6
82	9
83	4
84	7
85	0
86	1
87	5
88	4
89	5
90	4
91	9
92	0
93	2
94	3
95	3
96	4
97	9
98	0
99	3
100	6
101	1
102	0
103	2
104	8
105	8