A069187 - cp's OEIS frontend

A069187 Numbers k such that core(k) = ceiling(sqrt(k)) where core(k) is the squarefree part of k (the smallest integer such that k*core(k) is a square).

n	a(n)
1	1
2	2
3	20
4	90
5	272
6	650
7	1332
8	4160
9	6642
10	10100
11	14762
12	20880
13	28730
14	38612
15	50850
16	65792
17	83810
18	130682
19	160400
20	194922
21	234740
22	280370
23	332352
24	391250
25	457652
26	532170
27	615440
28	708122
29	810900
30	924482
31	1187010
32	1337492
33	1501850
34	1680912
35	1875530
36	2314962
37	2561600

[1, 2, 20, 90, 272, 650, 1332, 4160, 6642, 10100, 14762, 20880, 28730, 38612, 50850, 65792, 83810, 130682, 160400, 194922, 234740, 280370, 332352, 391250, 457652, 532170, 615440, 708122, 810900, 924482, 1187010, 1337492, 1501850, 1680912, 1875530, 2314962, 2561600]

cp's OEIS Frontend

A069187 Numbers k such that core(k) = ceiling(sqrt(k)) where core(k) is the squarefree part of k (the smallest integer such that k*core(k) is a square).

Table of values

List of values