A138299 - cp's OEIS frontend

A138299 For number bases b (2 <= b <= 10) consider numbers that can be written as repdigits with at least two digits: the sequence gives products of such numbers also having this property (the number bases are not necessarily distinct).

n	a(n)
1	9
2	12
3	15
4	16
5	18
6	20
7	21
8	24
9	27
10	28
11	30
12	32
13	33
14	35
15	36
16	40
17	42
18	44
19	45
20	48
21	50
22	54
23	55
24	60
25	63
26	66
27	70
28	77
29	80
30	88
31	91
32	93
33	99
34	121
35	124
36	129
37	156
38	171
39	172
40	182
41	215
42	219
43	228
44	242
45	255
46	273
47	285
48	292
49	312
50	333
51	341
52	342
53	364
54	365
55	400
56	438
57	444
58	455
59	468
60	511
61	546

[9, 12, 15, 16, 18, 20, 21, 24, 27, 28, 30, 32, 33, 35, 36, 40, 42, 44, 45, 48, 50, 54, 55, 60, 63, 66, 70, 77, 80, 88, 91, 93, 99, 121, 124, 129, 156, 171, 172, 182, 215, 219, 228, 242, 255, 273, 285, 292, 312, 333, 341, 342, 364, 365, 400, 438, 444, 455, 468, 511, 546]

cp's OEIS Frontend

A138299 For number bases b (2 <= b <= 10) consider numbers that can be written as repdigits with at least two digits: the sequence gives products of such numbers also having this property (the number bases are not necessarily distinct).

Table of values

List of values

n	a(n)
1	9
2	12
3	15
4	16
5	18
6	20
7	21
8	24
9	27
10	28
11	30
12	32
13	33
14	35
15	36
16	40
17	42
18	44
19	45
20	48
21	50
22	54
23	55
24	60
25	63
26	66
27	70
28	77
29	80
30	88
31	91
32	93
33	99
34	121
35	124
36	129
37	156
38	171
39	172
40	182
41	215
42	219
43	228
44	242
45	255
46	273
47	285
48	292
49	312
50	333
51	341
52	342
53	364
54	365
55	400
56	438
57	444
58	455
59	468
60	511
61	546

n	a(n)
1	9
2	12
3	15
4	16
5	18
6	20
7	21
8	24
9	27
10	28
11	30
12	32
13	33
14	35
15	36
16	40
17	42
18	44
19	45
20	48
21	50
22	54
23	55
24	60
25	63
26	66
27	70
28	77
29	80
30	88
31	91
32	93
33	99
34	121
35	124
36	129
37	156
38	171
39	172
40	182
41	215
42	219
43	228
44	242
45	255
46	273
47	285
48	292
49	312
50	333
51	341
52	342
53	364
54	365
55	400
56	438
57	444
58	455
59	468
60	511
61	546

n	a(n)
1	9
2	12
3	15
4	16
5	18
6	20
7	21
8	24
9	27
10	28
11	30
12	32
13	33
14	35
15	36
16	40
17	42
18	44
19	45
20	48
21	50
22	54
23	55
24	60
25	63
26	66
27	70
28	77
29	80
30	88
31	91
32	93
33	99
34	121
35	124
36	129
37	156
38	171
39	172
40	182
41	215
42	219
43	228
44	242
45	255
46	273
47	285
48	292
49	312
50	333
51	341
52	342
53	364
54	365
55	400
56	438
57	444
58	455
59	468
60	511
61	546