A274620 - cp's OEIS frontend

A274620 If n^2 has an even number of digits, write n after the left half of the digits of n^2 and before the right half, otherwise if n^2 has 2t+1 digits, write n after the first t digits of n^2 and before the last t+1 digits.

n	a(n)
1	11
2	24
3	39
4	146
5	255
6	366
7	479
8	684
9	891
10	11000
11	11121
12	11244
13	11369
14	11496
15	21525
16	21656
17	21789
18	31824
19	31961
20	42000
21	42141
22	42284
23	52329
24	52476
25	62525
26	62676
27	72729
28	72884
29	82941
30	93000
31	93161
32	103224
33	103389
34	113456
35	123525
36	123696
37	133769
38	143844
39	153921
40	164000

[11, 24, 39, 146, 255, 366, 479, 684, 891, 11000, 11121, 11244, 11369, 11496, 21525, 21656, 21789, 31824, 31961, 42000, 42141, 42284, 52329, 52476, 62525, 62676, 72729, 72884, 82941, 93000, 93161, 103224, 103389, 113456, 123525, 123696, 133769, 143844, 153921, 164000]

cp's OEIS Frontend

A274620 If n^2 has an even number of digits, write n after the left half of the digits of n^2 and before the right half, otherwise if n^2 has 2t+1 digits, write n after the first t digits of n^2 and before the last t+1 digits.

Table of values

List of values