A190404 - cp's OEIS frontend

A190404 Decimal expansion of (1/2)(1 + Sum_{k>=1} (1/2)^T(k)), where T=A000217 (triangular numbers); based on row 1 of the natural number array, A000027.

n	a(n)
0	8
1	2
2	0
3	8
4	1
5	6
6	2
7	8
8	0
9	3
10	2
11	7
12	5
13	7
14	6
15	9
16	3
17	3
18	1
19	4
20	6
21	9
22	2
23	1
24	3
25	8
26	5
27	1
28	1
29	2
30	7
31	1
32	4
33	7
34	1
35	7
36	1
37	1
38	3
39	0
40	3
41	0
42	7
43	6
44	8
45	9
46	7
47	8
48	3
49	6
50	9
51	8
52	7
53	3
54	9
55	0
56	2
57	3
58	2
59	5
60	8
61	1
62	1
63	1
64	9
65	0
66	0
67	7
68	2
69	3
70	0
71	1
72	8
73	6
74	6
75	6
76	7
77	5
78	8
79	8
80	7
81	8
82	0
83	0
84	1
85	8
86	2
87	0
88	8
89	5
90	8
91	1
92	1
93	6
94	7
95	9
96	5
97	6
98	6
99	5
100	4
101	3
102	0
103	4
104	4
105	8
106	6
107	7
108	6
109	5
110	8
111	1
112	7
113	1
114	8
115	0
116	9
117	7
118	3
119	0

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

cp's OEIS Frontend

A190404 Decimal expansion of (1/2)(1 + Sum_{k>=1} (1/2)^T(k)), where T=A000217 (triangular numbers); based on row 1 of the natural number array, A000027.

Table of values

List of values

n	a(n)
0	8
1	2
2	0
3	8
4	1
5	6
6	2
7	8
8	0
9	3
10	2
11	7
12	5
13	7
14	6
15	9
16	3
17	3
18	1
19	4
20	6
21	9
22	2
23	1
24	3
25	8
26	5
27	1
28	1
29	2
30	7
31	1
32	4
33	7
34	1
35	7
36	1
37	1
38	3
39	0
40	3
41	0
42	7
43	6
44	8
45	9
46	7
47	8
48	3
49	6
50	9
51	8
52	7
53	3
54	9
55	0
56	2
57	3
58	2
59	5
60	8
61	1
62	1
63	1
64	9
65	0
66	0
67	7
68	2
69	3
70	0
71	1
72	8
73	6
74	6
75	6
76	7
77	5
78	8
79	8
80	7
81	8
82	0
83	0
84	1
85	8
86	2
87	0
88	8
89	5
90	8
91	1
92	1
93	6
94	7
95	9
96	5
97	6
98	6
99	5
100	4
101	3
102	0
103	4
104	4
105	8
106	6
107	7
108	6
109	5
110	8
111	1
112	7
113	1
114	8
115	0
116	9
117	7
118	3
119	0

n	a(n)
0	8
1	2
2	0
3	8
4	1
5	6
6	2
7	8
8	0
9	3
10	2
11	7
12	5
13	7
14	6
15	9
16	3
17	3
18	1
19	4
20	6
21	9
22	2
23	1
24	3
25	8
26	5
27	1
28	1
29	2
30	7
31	1
32	4
33	7
34	1
35	7
36	1
37	1
38	3
39	0
40	3
41	0
42	7
43	6
44	8
45	9
46	7
47	8
48	3
49	6
50	9
51	8
52	7
53	3
54	9
55	0
56	2
57	3
58	2
59	5
60	8
61	1
62	1
63	1
64	9
65	0
66	0
67	7
68	2
69	3
70	0
71	1
72	8
73	6
74	6
75	6
76	7
77	5
78	8
79	8
80	7
81	8
82	0
83	0
84	1
85	8
86	2
87	0
88	8
89	5
90	8
91	1
92	1
93	6
94	7
95	9
96	5
97	6
98	6
99	5
100	4
101	3
102	0
103	4
104	4
105	8
106	6
107	7
108	6
109	5
110	8
111	1
112	7
113	1
114	8
115	0
116	9
117	7
118	3
119	0

n	a(n)
0	8
1	2
2	0
3	8
4	1
5	6
6	2
7	8
8	0
9	3
10	2
11	7
12	5
13	7
14	6
15	9
16	3
17	3
18	1
19	4
20	6
21	9
22	2
23	1
24	3
25	8
26	5
27	1
28	1
29	2
30	7
31	1
32	4
33	7
34	1
35	7
36	1
37	1
38	3
39	0
40	3
41	0
42	7
43	6
44	8
45	9
46	7
47	8
48	3
49	6
50	9
51	8
52	7
53	3
54	9
55	0
56	2
57	3
58	2
59	5
60	8
61	1
62	1
63	1
64	9
65	0
66	0
67	7
68	2
69	3
70	0
71	1
72	8
73	6
74	6
75	6
76	7
77	5
78	8
79	8
80	7
81	8
82	0
83	0
84	1
85	8
86	2
87	0
88	8
89	5
90	8
91	1
92	1
93	6
94	7
95	9
96	5
97	6
98	6
99	5
100	4
101	3
102	0
103	4
104	4
105	8
106	6
107	7
108	6
109	5
110	8
111	1
112	7
113	1
114	8
115	0
116	9
117	7
118	3
119	0