A153745 - cp's OEIS frontend

A153745 Numbers k such that the number of digits d in k^2 is not prime and for each factor f of d the sum of the d/f digit groupings in k^2 of size f is a square.

n	a(n)
1	1
2	2
3	3
4	39
5	60
6	86
7	90
8	321
9	347
10	401
11	3387
12	3414
13	3578
14	3900
15	4767
16	6000
17	6549
18	6552
19	6744
20	6780
21	6783
22	7387
23	7862
24	7889
25	8367
26	8598
27	8600
28	8773
29	8898
30	9000
31	9220
32	9884
33	9885
34	10000
35	10001
36	10002
37	10003
38	10004
39	10005
40	10010
41	10011
42	10012
43	10013
44	10020

[1, 2, 3, 39, 60, 86, 90, 321, 347, 401, 3387, 3414, 3578, 3900, 4767, 6000, 6549, 6552, 6744, 6780, 6783, 7387, 7862, 7889, 8367, 8598, 8600, 8773, 8898, 9000, 9220, 9884, 9885, 10000, 10001, 10002, 10003, 10004, 10005, 10010, 10011, 10012, 10013, 10020]

cp's OEIS Frontend

A153745 Numbers k such that the number of digits d in k^2 is not prime and for each factor f of d the sum of the d/f digit groupings in k^2 of size f is a square.

Table of values

List of values