A381806 - cp's OEIS frontend

A381806 Numbers that cannot be written as a product of squarefree numbers with distinct sums of prime indices.

n	a(n)
1	4
2	8
3	9
4	16
5	24
6	25
7	27
8	32
9	40
10	48
11	49
12	54
13	56
14	64
15	72
16	80
17	81
18	88
19	96
20	104
21	108
22	112
23	121
24	125
25	128
26	135
27	136
28	144
29	152
30	160
31	162
32	169
33	176
34	184
35	189
36	192
37	200
38	208
39	216
40	224
41	232
42	240
43	243
44	248
45	250
46	256
47	272
48	288
49	289
50	296
51	297
52	304
53	320
54	324
55	328
56	336

[4, 8, 9, 16, 24, 25, 27, 32, 40, 48, 49, 54, 56, 64, 72, 80, 81, 88, 96, 104, 108, 112, 121, 125, 128, 135, 136, 144, 152, 160, 162, 169, 176, 184, 189, 192, 200, 208, 216, 224, 232, 240, 243, 248, 250, 256, 272, 288, 289, 296, 297, 304, 320, 324, 328, 336]

cp's OEIS Frontend

A381806 Numbers that cannot be written as a product of squarefree numbers with distinct sums of prime indices.

Table of values

List of values

n	a(n)
1	4
2	8
3	9
4	16
5	24
6	25
7	27
8	32
9	40
10	48
11	49
12	54
13	56
14	64
15	72
16	80
17	81
18	88
19	96
20	104
21	108
22	112
23	121
24	125
25	128
26	135
27	136
28	144
29	152
30	160
31	162
32	169
33	176
34	184
35	189
36	192
37	200
38	208
39	216
40	224
41	232
42	240
43	243
44	248
45	250
46	256
47	272
48	288
49	289
50	296
51	297
52	304
53	320
54	324
55	328
56	336

n	a(n)
1	4
2	8
3	9
4	16
5	24
6	25
7	27
8	32
9	40
10	48
11	49
12	54
13	56
14	64
15	72
16	80
17	81
18	88
19	96
20	104
21	108
22	112
23	121
24	125
25	128
26	135
27	136
28	144
29	152
30	160
31	162
32	169
33	176
34	184
35	189
36	192
37	200
38	208
39	216
40	224
41	232
42	240
43	243
44	248
45	250
46	256
47	272
48	288
49	289
50	296
51	297
52	304
53	320
54	324
55	328
56	336

n	a(n)
1	4
2	8
3	9
4	16
5	24
6	25
7	27
8	32
9	40
10	48
11	49
12	54
13	56
14	64
15	72
16	80
17	81
18	88
19	96
20	104
21	108
22	112
23	121
24	125
25	128
26	135
27	136
28	144
29	152
30	160
31	162
32	169
33	176
34	184
35	189
36	192
37	200
38	208
39	216
40	224
41	232
42	240
43	243
44	248
45	250
46	256
47	272
48	288
49	289
50	296
51	297
52	304
53	320
54	324
55	328
56	336