A173203 - cp's OEIS frontend

A173203 a(n) is the smallest number which has in its English name the letter "e" in the n-th position beginning the count from the end, or -1 if no such number exists.

n	a(n)
1	1
2	3
3	13
4	7
5	8
6	11
7	21
8	17
9	23
10	74
11	73
12	104
13	103
14	111
15	115
16	113
17	117
18	124
19	123
20	173
21	373
22	723
23	773
24	873
25	1103
26	1111
27	1115
28	1113
29	1117
30	1124
31	1123
32	1173
33	1323
34	1373
35	3373
36	7323
37	7373
38	8373
39	11373
40	17323
41	17373
42	23373
43	73323
44	73373
45	103323
46	103373
47	111373

[1, 3, 13, 7, 8, 11, 21, 17, 23, 74, 73, 104, 103, 111, 115, 113, 117, 124, 123, 173, 373, 723, 773, 873, 1103, 1111, 1115, 1113, 1117, 1124, 1123, 1173, 1323, 1373, 3373, 7323, 7373, 8373, 11373, 17323, 17373, 23373, 73323, 73373, 103323, 103373, 111373]

cp's OEIS Frontend

A173203 a(n) is the smallest number which has in its English name the letter "e" in the n-th position beginning the count from the end, or -1 if no such number exists.

Table of values

List of values