A350218 - cp's OEIS frontend

A350218 a(1) = 1. a(n) is the smallest unlisted number, the name of which does not contain the first letter of the name of a(n-1) in US English.

n	a(n)
1	1
2	3
3	4
4	2
5	5
6	6
7	8
8	30
9	7
10	9
11	12
12	11
13	32
14	100
15	10
16	101
17	13
18	104
19	15
20	16
21	14
22	17
23	18
24	34
25	105
26	19
27	33
28	106
29	20
30	107
31	23
32	109
33	25
34	111
35	26
36	400
37	21
38	401
39	22
40	404
41	27
42	405
43	28
44	406
45	29
46	407
47	31
48	409
49	36
50	411
51	37
52	500
53	38
54	501
55	39
56	504
57	60
58	24
59	505
60	61
61	35
62	506
63	62
64	40
65	63
66	41
67	66
68	42
69	67
70	43

[1, 3, 4, 2, 5, 6, 8, 30, 7, 9, 12, 11, 32, 100, 10, 101, 13, 104, 15, 16, 14, 17, 18, 34, 105, 19, 33, 106, 20, 107, 23, 109, 25, 111, 26, 400, 21, 401, 22, 404, 27, 405, 28, 406, 29, 407, 31, 409, 36, 411, 37, 500, 38, 501, 39, 504, 60, 24, 505, 61, 35, 506, 62, 40, 63, 41, 66, 42, 67, 43]

cp's OEIS Frontend

A350218 a(1) = 1. a(n) is the smallest unlisted number, the name of which does not contain the first letter of the name of a(n-1) in US English.

Table of values

List of values

n	a(n)
1	1
2	3
3	4
4	2
5	5
6	6
7	8
8	30
9	7
10	9
11	12
12	11
13	32
14	100
15	10
16	101
17	13
18	104
19	15
20	16
21	14
22	17
23	18
24	34
25	105
26	19
27	33
28	106
29	20
30	107
31	23
32	109
33	25
34	111
35	26
36	400
37	21
38	401
39	22
40	404
41	27
42	405
43	28
44	406
45	29
46	407
47	31
48	409
49	36
50	411
51	37
52	500
53	38
54	501
55	39
56	504
57	60
58	24
59	505
60	61
61	35
62	506
63	62
64	40
65	63
66	41
67	66
68	42
69	67
70	43

n	a(n)
1	1
2	3
3	4
4	2
5	5
6	6
7	8
8	30
9	7
10	9
11	12
12	11
13	32
14	100
15	10
16	101
17	13
18	104
19	15
20	16
21	14
22	17
23	18
24	34
25	105
26	19
27	33
28	106
29	20
30	107
31	23
32	109
33	25
34	111
35	26
36	400
37	21
38	401
39	22
40	404
41	27
42	405
43	28
44	406
45	29
46	407
47	31
48	409
49	36
50	411
51	37
52	500
53	38
54	501
55	39
56	504
57	60
58	24
59	505
60	61
61	35
62	506
63	62
64	40
65	63
66	41
67	66
68	42
69	67
70	43

n	a(n)
1	1
2	3
3	4
4	2
5	5
6	6
7	8
8	30
9	7
10	9
11	12
12	11
13	32
14	100
15	10
16	101
17	13
18	104
19	15
20	16
21	14
22	17
23	18
24	34
25	105
26	19
27	33
28	106
29	20
30	107
31	23
32	109
33	25
34	111
35	26
36	400
37	21
38	401
39	22
40	404
41	27
42	405
43	28
44	406
45	29
46	407
47	31
48	409
49	36
50	411
51	37
52	500
53	38
54	501
55	39
56	504
57	60
58	24
59	505
60	61
61	35
62	506
63	62
64	40
65	63
66	41
67	66
68	42
69	67
70	43