A379146 - cp's OEIS frontend

A379146 Numbers k that are not in A378930 (i.e., are never the value of f(n) = n * d(n) / gcd(n, d(n))^2, where d = A000005).

n	a(n)
1	18
2	27
3	45
4	63
5	64
6	72
7	99
8	112
9	117
10	144
11	153
12	160
13	171
14	207
15	225
16	243
17	252
18	261
19	279
20	288
21	320
22	333
23	336
24	352
25	360
26	369
27	387
28	396
29	416
30	423
31	441
32	468
33	477
34	504
35	531
36	544
37	549
38	567
39	576
40	603
41	608
42	612
43	616
44	625
45	639
46	657
47	684
48	711
49	728
50	736
51	747
52	792
53	801
54	828
55	873
56	880
57	891
58	909
59	927
60	928
61	936
62	952
63	963
64	981
65	992

[18, 27, 45, 63, 64, 72, 99, 112, 117, 144, 153, 160, 171, 207, 225, 243, 252, 261, 279, 288, 320, 333, 336, 352, 360, 369, 387, 396, 416, 423, 441, 468, 477, 504, 531, 544, 549, 567, 576, 603, 608, 612, 616, 625, 639, 657, 684, 711, 728, 736, 747, 792, 801, 828, 873, 880, 891, 909, 927, 928, 936, 952, 963, 981, 992]

cp's OEIS Frontend

A379146 Numbers k that are not in A378930 (i.e., are never the value of f(n) = n * d(n) / gcd(n, d(n))^2, where d = A000005).

Table of values

List of values

n	a(n)
1	18
2	27
3	45
4	63
5	64
6	72
7	99
8	112
9	117
10	144
11	153
12	160
13	171
14	207
15	225
16	243
17	252
18	261
19	279
20	288
21	320
22	333
23	336
24	352
25	360
26	369
27	387
28	396
29	416
30	423
31	441
32	468
33	477
34	504
35	531
36	544
37	549
38	567
39	576
40	603
41	608
42	612
43	616
44	625
45	639
46	657
47	684
48	711
49	728
50	736
51	747
52	792
53	801
54	828
55	873
56	880
57	891
58	909
59	927
60	928
61	936
62	952
63	963
64	981
65	992

n	a(n)
1	18
2	27
3	45
4	63
5	64
6	72
7	99
8	112
9	117
10	144
11	153
12	160
13	171
14	207
15	225
16	243
17	252
18	261
19	279
20	288
21	320
22	333
23	336
24	352
25	360
26	369
27	387
28	396
29	416
30	423
31	441
32	468
33	477
34	504
35	531
36	544
37	549
38	567
39	576
40	603
41	608
42	612
43	616
44	625
45	639
46	657
47	684
48	711
49	728
50	736
51	747
52	792
53	801
54	828
55	873
56	880
57	891
58	909
59	927
60	928
61	936
62	952
63	963
64	981
65	992

n	a(n)
1	18
2	27
3	45
4	63
5	64
6	72
7	99
8	112
9	117
10	144
11	153
12	160
13	171
14	207
15	225
16	243
17	252
18	261
19	279
20	288
21	320
22	333
23	336
24	352
25	360
26	369
27	387
28	396
29	416
30	423
31	441
32	468
33	477
34	504
35	531
36	544
37	549
38	567
39	576
40	603
41	608
42	612
43	616
44	625
45	639
46	657
47	684
48	711
49	728
50	736
51	747
52	792
53	801
54	828
55	873
56	880
57	891
58	909
59	927
60	928
61	936
62	952
63	963
64	981
65	992