A265153 - cp's OEIS frontend

A265153 a(1) = 15, a(n) = smallest number > a(n-1) such that the concatenation of a(n-1) and a(n) is a square.

n	a(n)
1	15
2	21
3	316
4	969
5	6996
6	55401
7	390625
8	1827776
9	2562500
10	8273225
11	37136225
12	38371001
13	43037561
14	258421444
15	792669636
16	2928667041
17	38512058944
18	260125180889
19	405701529401
20	688085041025
21	5890084946609
22	22508111494025
23	64017148660004
24	537387232526336
25	4166255964768676

[15, 21, 316, 969, 6996, 55401, 390625, 1827776, 2562500, 8273225, 37136225, 38371001, 43037561, 258421444, 792669636, 2928667041, 38512058944, 260125180889, 405701529401, 688085041025, 5890084946609, 22508111494025, 64017148660004, 537387232526336, 4166255964768676]

cp's OEIS Frontend

A265153 a(1) = 15, a(n) = smallest number > a(n-1) such that the concatenation of a(n-1) and a(n) is a square.

Table of values

List of values