A366585 - cp's OEIS frontend

A366585 Write down the positive integers. To obtain the terms of the sequence, concatenate groups of these so the first digit of each term is the number of consecutive numbers that are concatenated.

n	a(n)
1	1
2	23
3	4567
4	89101112131415
5	16
6	17
7	18
8	19
9	2021
10	2223
11	2425
12	2627
13	2829
14	303132
15	333435
16	363738
17	394041
18	42434445
19	46474849
20	5051525354
21	5556575859
22	606162636465
23	666768697071
24	72737475767778
25	79808182838485
26	8687888990919293
27	949596979899100101102
28	103
29	104
30	105
31	106
32	107

[1, 23, 4567, 89101112131415, 16, 17, 18, 19, 2021, 2223, 2425, 2627, 2829, 303132, 333435, 363738, 394041, 42434445, 46474849, 5051525354, 5556575859, 606162636465, 666768697071, 72737475767778, 79808182838485, 8687888990919293, 949596979899100101102, 103, 104, 105, 106, 107]

cp's OEIS Frontend

A366585 Write down the positive integers. To obtain the terms of the sequence, concatenate groups of these so the first digit of each term is the number of consecutive numbers that are concatenated.

Table of values

List of values