A242418 - cp's OEIS frontend

A242418 Numbers n in whose prime factorization, n = 2^e1 * 3^e2 * 5^e3 * ... * p_k^e_k, the exponents (some of them possibly zero) of prime factors from 2 to p_k form a palindrome, so that e1 = e_k, e2 = e_{k-1}, etc.

n	a(n)
1	1
2	2
3	4
4	6
5	8
6	10
7	14
8	16
9	22
10	26
11	30
12	32
13	34
14	36
15	38
16	46
17	58
18	62
19	64
20	74
21	82
22	86
23	90
24	94
25	100
26	106
27	110
28	118
29	122
30	128
31	134
32	142
33	146
34	158
35	166
36	178
37	194
38	196
39	202
40	206
41	210
42	214
43	216
44	218
45	226
46	238
47	254
48	256
49	262
50	270
51	274
52	278
53	298
54	300
55	302
56	314
57	326
58	334

[1, 2, 4, 6, 8, 10, 14, 16, 22, 26, 30, 32, 34, 36, 38, 46, 58, 62, 64, 74, 82, 86, 90, 94, 100, 106, 110, 118, 122, 128, 134, 142, 146, 158, 166, 178, 194, 196, 202, 206, 210, 214, 216, 218, 226, 238, 254, 256, 262, 270, 274, 278, 298, 300, 302, 314, 326, 334]

cp's OEIS Frontend

A242418 Numbers n in whose prime factorization, n = 2^e1 * 3^e2 * 5^e3 * ... * p_k^e_k, the exponents (some of them possibly zero) of prime factors from 2 to p_k form a palindrome, so that e1 = e_k, e2 = e_{k-1}, etc.

Table of values

List of values

n	a(n)
1	1
2	2
3	4
4	6
5	8
6	10
7	14
8	16
9	22
10	26
11	30
12	32
13	34
14	36
15	38
16	46
17	58
18	62
19	64
20	74
21	82
22	86
23	90
24	94
25	100
26	106
27	110
28	118
29	122
30	128
31	134
32	142
33	146
34	158
35	166
36	178
37	194
38	196
39	202
40	206
41	210
42	214
43	216
44	218
45	226
46	238
47	254
48	256
49	262
50	270
51	274
52	278
53	298
54	300
55	302
56	314
57	326
58	334

n	a(n)
1	1
2	2
3	4
4	6
5	8
6	10
7	14
8	16
9	22
10	26
11	30
12	32
13	34
14	36
15	38
16	46
17	58
18	62
19	64
20	74
21	82
22	86
23	90
24	94
25	100
26	106
27	110
28	118
29	122
30	128
31	134
32	142
33	146
34	158
35	166
36	178
37	194
38	196
39	202
40	206
41	210
42	214
43	216
44	218
45	226
46	238
47	254
48	256
49	262
50	270
51	274
52	278
53	298
54	300
55	302
56	314
57	326
58	334

n	a(n)
1	1
2	2
3	4
4	6
5	8
6	10
7	14
8	16
9	22
10	26
11	30
12	32
13	34
14	36
15	38
16	46
17	58
18	62
19	64
20	74
21	82
22	86
23	90
24	94
25	100
26	106
27	110
28	118
29	122
30	128
31	134
32	142
33	146
34	158
35	166
36	178
37	194
38	196
39	202
40	206
41	210
42	214
43	216
44	218
45	226
46	238
47	254
48	256
49	262
50	270
51	274
52	278
53	298
54	300
55	302
56	314
57	326
58	334