A004727 - OEIS

A004727

Delete all 8's from the sequence of nonnegative integers.

0, 1, 2, 3, 4, 5, 6, 7, 9, 10, 11, 12, 13, 14, 15, 16, 17, 1, 19, 20, 21, 22, 23, 24, 25, 26, 27, 2, 29, 30, 31, 32, 33, 34, 35, 36, 37, 3, 39, 40, 41, 42, 43, 44, 45, 46, 47, 4, 49, 50, 51, 52, 53, 54, 55, 56, 57, 5, 59, 60, 61, 62, 63, 64, 65, 66, 67, 6, 69, 70, 71

(list; graph; refs; listen; history; text; internal format)

OFFSET

0,3

LINKS

Table of n, a(n) for n=0..70.

PROG

(Python)

def A004727(n):

l = len(str(n))

m = 8*(10**l-1)//9

k = n + l - int(n+l < m)

return 7 if k == m else int(str(k).replace('8', '')) # Chai Wah Wu, Apr 20 2021