A066547 - cp's OEIS frontend

A066547 Let N = 123456789101112131415161718..., the concatenation of the natural numbers. a(n) is the n-digit number formed from the digits of N starting from the {n(n-1)/2 +1}th digit. Omit any leading zeros.

n	a(n)
1	1
2	23
3	456
4	7891
5	1112
6	131415
7	1617181
8	92021222
9	324252627
10	2829303132
11	33343536373
12	839404142434
13	4454647484950
14	51525354555657
15	585960616263646
16	5666768697071727
17	37475767778798081
18	828384858687888990
19	9192939495969798991
20	101102103104105106
21	107108109110111112113

[1, 23, 456, 7891, 1112, 131415, 1617181, 92021222, 324252627, 2829303132, 33343536373, 839404142434, 4454647484950, 51525354555657, 585960616263646, 5666768697071727, 37475767778798081, 828384858687888990, 9192939495969798991, 101102103104105106, 107108109110111112113]

cp's OEIS Frontend

A066547 Let N = 123456789101112131415161718..., the concatenation of the natural numbers. a(n) is the n-digit number formed from the digits of N starting from the {n(n-1)/2 +1}th digit. Omit any leading zeros.

Table of values

List of values