A069535 - cp's OEIS frontend

A069535 Treated as strings, n and its reversal are substrings of n!.

n	a(n)
1	1
2	2
3	4
4	20
5	30
6	33
7	42
8	44
9	45
10	51
11	60
12	67
13	72
14	75
15	78
16	79
17	80
18	81
19	82
20	84
21	88
22	91
23	94
24	95
25	97
26	98
27	99
28	116
29	140
30	141
31	166
32	170
33	180
34	188
35	198
36	200
37	202
38	210
39	222
40	228
41	231
42	238
43	252
44	261
45	264
46	265
47	272
48	285
49	286
50	292
51	293
52	297
53	311
54	313
55	315
56	317
57	321

[1, 2, 4, 20, 30, 33, 42, 44, 45, 51, 60, 67, 72, 75, 78, 79, 80, 81, 82, 84, 88, 91, 94, 95, 97, 98, 99, 116, 140, 141, 166, 170, 180, 188, 198, 200, 202, 210, 222, 228, 231, 238, 252, 261, 264, 265, 272, 285, 286, 292, 293, 297, 311, 313, 315, 317, 321]

cp's OEIS Frontend

A069535 Treated as strings, n and its reversal are substrings of n!.

Table of values

List of values

n	a(n)
1	1
2	2
3	4
4	20
5	30
6	33
7	42
8	44
9	45
10	51
11	60
12	67
13	72
14	75
15	78
16	79
17	80
18	81
19	82
20	84
21	88
22	91
23	94
24	95
25	97
26	98
27	99
28	116
29	140
30	141
31	166
32	170
33	180
34	188
35	198
36	200
37	202
38	210
39	222
40	228
41	231
42	238
43	252
44	261
45	264
46	265
47	272
48	285
49	286
50	292
51	293
52	297
53	311
54	313
55	315
56	317
57	321

n	a(n)
1	1
2	2
3	4
4	20
5	30
6	33
7	42
8	44
9	45
10	51
11	60
12	67
13	72
14	75
15	78
16	79
17	80
18	81
19	82
20	84
21	88
22	91
23	94
24	95
25	97
26	98
27	99
28	116
29	140
30	141
31	166
32	170
33	180
34	188
35	198
36	200
37	202
38	210
39	222
40	228
41	231
42	238
43	252
44	261
45	264
46	265
47	272
48	285
49	286
50	292
51	293
52	297
53	311
54	313
55	315
56	317
57	321

n	a(n)
1	1
2	2
3	4
4	20
5	30
6	33
7	42
8	44
9	45
10	51
11	60
12	67
13	72
14	75
15	78
16	79
17	80
18	81
19	82
20	84
21	88
22	91
23	94
24	95
25	97
26	98
27	99
28	116
29	140
30	141
31	166
32	170
33	180
34	188
35	198
36	200
37	202
38	210
39	222
40	228
41	231
42	238
43	252
44	261
45	264
46	265
47	272
48	285
49	286
50	292
51	293
52	297
53	311
54	313
55	315
56	317
57	321