A350870 - cp's OEIS frontend

A350870 Numbers k = x.y such that x.y = (x+y)^2, when x and y have the same number of digits, "." means concatenation, and y may not begin with 0.

n	a(n)
1	81
2	2025
3	3025
4	494209
5	24502500
6	25502500
7	52881984
8	60481729
9	6049417284
10	6832014336
11	101558217124
12	108878221089
13	123448227904
14	127194229449
15	152344237969
16	213018248521
17	217930248900
18	249500250000
19	250500250000
20	284270248900
21	289940248521
22	371718237969
23	413908229449
24	420744227904

[81, 2025, 3025, 494209, 24502500, 25502500, 52881984, 60481729, 6049417284, 6832014336, 101558217124, 108878221089, 123448227904, 127194229449, 152344237969, 213018248521, 217930248900, 249500250000, 250500250000, 284270248900, 289940248521, 371718237969, 413908229449, 420744227904]

cp's OEIS Frontend

A350870 Numbers k = x.y such that x.y = (x+y)^2, when x and y have the same number of digits, "." means concatenation, and y may not begin with 0.

Table of values

List of values