A267124 - cp's OEIS frontend

A267124 Primitive practical numbers: practical numbers that are squarefree or practical numbers that when divided by any of its prime factors whose factorization exponent is greater than 1 is no longer practical.

n	a(n)
1	1
2	2
3	6
4	20
5	28
6	30
7	42
8	66
9	78
10	88
11	104
12	140
13	204
14	210
15	220
16	228
17	260
18	272
19	276
20	304
21	306
22	308
23	330
24	340
25	342
26	348
27	364
28	368
29	380
30	390
31	414
32	460
33	462
34	464
35	476
36	496
37	510
38	522
39	532
40	546
41	558
42	570
43	580
44	620
45	644
46	666
47	690
48	714
49	740
50	744
51	798
52	812
53	820
54	858
55	860
56	868
57	870
58	888
59	930
60	966
61	984

[1, 2, 6, 20, 28, 30, 42, 66, 78, 88, 104, 140, 204, 210, 220, 228, 260, 272, 276, 304, 306, 308, 330, 340, 342, 348, 364, 368, 380, 390, 414, 460, 462, 464, 476, 496, 510, 522, 532, 546, 558, 570, 580, 620, 644, 666, 690, 714, 740, 744, 798, 812, 820, 858, 860, 868, 870, 888, 930, 966, 984]

cp's OEIS Frontend

A267124 Primitive practical numbers: practical numbers that are squarefree or practical numbers that when divided by any of its prime factors whose factorization exponent is greater than 1 is no longer practical.

Table of values

List of values

n	a(n)
1	1
2	2
3	6
4	20
5	28
6	30
7	42
8	66
9	78
10	88
11	104
12	140
13	204
14	210
15	220
16	228
17	260
18	272
19	276
20	304
21	306
22	308
23	330
24	340
25	342
26	348
27	364
28	368
29	380
30	390
31	414
32	460
33	462
34	464
35	476
36	496
37	510
38	522
39	532
40	546
41	558
42	570
43	580
44	620
45	644
46	666
47	690
48	714
49	740
50	744
51	798
52	812
53	820
54	858
55	860
56	868
57	870
58	888
59	930
60	966
61	984

n	a(n)
1	1
2	2
3	6
4	20
5	28
6	30
7	42
8	66
9	78
10	88
11	104
12	140
13	204
14	210
15	220
16	228
17	260
18	272
19	276
20	304
21	306
22	308
23	330
24	340
25	342
26	348
27	364
28	368
29	380
30	390
31	414
32	460
33	462
34	464
35	476
36	496
37	510
38	522
39	532
40	546
41	558
42	570
43	580
44	620
45	644
46	666
47	690
48	714
49	740
50	744
51	798
52	812
53	820
54	858
55	860
56	868
57	870
58	888
59	930
60	966
61	984

n	a(n)
1	1
2	2
3	6
4	20
5	28
6	30
7	42
8	66
9	78
10	88
11	104
12	140
13	204
14	210
15	220
16	228
17	260
18	272
19	276
20	304
21	306
22	308
23	330
24	340
25	342
26	348
27	364
28	368
29	380
30	390
31	414
32	460
33	462
34	464
35	476
36	496
37	510
38	522
39	532
40	546
41	558
42	570
43	580
44	620
45	644
46	666
47	690
48	714
49	740
50	744
51	798
52	812
53	820
54	858
55	860
56	868
57	870
58	888
59	930
60	966
61	984