A137004 - cp's OEIS frontend

A137004 Numbers k such that k and k^2 use only the digits 1, 2, 5, 6 and 7.

n	a(n)
1	1
2	5
3	11
4	15
5	16
6	25
7	26
8	75
9	76
10	125
11	165
12	166
13	275
14	276
15	511
16	515
17	516
18	525
19	526
20	715
21	716
22	725
23	1125
24	1275
25	1665
26	1666
27	2261
28	2275
29	2675
30	5125
31	5165
32	7261
33	7525
34	11215
35	11275
36	12511
37	12515
38	12715
39	16665
40	16666
41	25525
42	25526
43	25715
44	25725
45	26675
46	26761
47	27525
48	51211
49	72261
50	72576
51	125125
52	125165
53	125166
54	125525
55	125526
56	127525
57	161761
58	165125

[1, 5, 11, 15, 16, 25, 26, 75, 76, 125, 165, 166, 275, 276, 511, 515, 516, 525, 526, 715, 716, 725, 1125, 1275, 1665, 1666, 2261, 2275, 2675, 5125, 5165, 7261, 7525, 11215, 11275, 12511, 12515, 12715, 16665, 16666, 25525, 25526, 25715, 25725, 26675, 26761, 27525, 51211, 72261, 72576, 125125, 125165, 125166, 125525, 125526, 127525, 161761, 165125]

cp's OEIS Frontend

A137004 Numbers k such that k and k^2 use only the digits 1, 2, 5, 6 and 7.

Table of values

List of values