A173014 - cp's OEIS frontend

A173014 a(1) = 1, for n >= 2; a(n) = the smallest number h such that sigma(h) = A000203(h) = a(n-1) + 4, a(n) = 0 if no such number exists.

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

[1, 0, 3, 4, 7, 0, 3, 4, 7, 0, 3, 4, 7, 0, 3, 4, 7, 0, 3, 4, 7, 0, 3, 4, 7, 0, 3, 4, 7, 0, 3, 4, 7, 0, 3, 4, 7, 0, 3, 4, 7, 0, 3, 4, 7, 0, 3, 4, 7, 0, 3, 4, 7, 0, 3, 4, 7, 0, 3, 4, 7, 0, 3, 4, 7, 0, 3, 4, 7, 0, 3, 4, 7]

cp's OEIS Frontend

A173014 a(1) = 1, for n >= 2; a(n) = the smallest number h such that sigma(h) = A000203(h) = a(n-1) + 4, a(n) = 0 if no such number exists.

Table of values

List of values

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

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

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