A258844 - cp's OEIS frontend

A258844 Numbers k with the property that it is possible to write the base 2 expansion of k as concat(a_2,b_2), with a_2>0 and b_2>0 such that, converting a_2 and b_2 to base 10 as a and b, we have (a+b)^2 = k.

n	a(n)
1	9
2	36
3	49
4	100
5	225
6	784
7	961
8	1296
9	2601
10	3969
11	7225
12	8281
13	14400
14	16129
15	18496
16	21609
17	29241
18	34969
19	42025
20	65025
21	116964
22	123201
23	133225
24	246016
25	261121
26	278784
27	465124
28	508369
29	672400
30	700569
31	828100
32	1046529
33	1368900
34	1590121
35	1782225
36	4064256
37	4190209
38	4326400

[9, 36, 49, 100, 225, 784, 961, 1296, 2601, 3969, 7225, 8281, 14400, 16129, 18496, 21609, 29241, 34969, 42025, 65025, 116964, 123201, 133225, 246016, 261121, 278784, 465124, 508369, 672400, 700569, 828100, 1046529, 1368900, 1590121, 1782225, 4064256, 4190209, 4326400]

cp's OEIS Frontend

A258844 Numbers k with the property that it is possible to write the base 2 expansion of k as concat(a_2,b_2), with a_2>0 and b_2>0 such that, converting a_2 and b_2 to base 10 as a and b, we have (a+b)^2 = k.

Table of values

List of values