A228586 - cp's OEIS frontend

A228586 Write the semiprimes backwards in base 10 and juxtapose (concatenate) their digits.

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

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

cp's OEIS Frontend

A228586 Write the semiprimes backwards in base 10 and juxtapose (concatenate) their digits.

Table of values

List of values

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

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

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