A157911 - OEIS

A157911

Nonprimes whose digits are all cubes.

0, 1, 8, 10, 18, 80, 81, 88, 100, 108, 110, 111, 118, 180, 188, 800, 801, 808, 810, 818, 880, 888, 1000, 1001, 1008, 1010, 1011, 1018, 1080, 1081, 1088, 1100, 1101, 1108, 1110, 1111, 1118, 1180, 1188, 1800, 1808, 1810, 1818, 1880, 1881, 1888, 8000, 8001

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

OFFSET

1,3

COMMENTS

Cube digits are 0, 1 or 8 (i.e., 0=0*0*0, 1=1*1*1 or 8=2*2*2).

LINKS

Harvey P. Dale, Table of n, a(n) for n = 1..2000

FORMULA

A046031 SET-MINUS A000040. [R. J. Mathar, Mar 17 2009]

MATHEMATICA

Select[FromDigits/@Tuples[{0, 1, 8}, 5], !PrimeQ[#]&] (* Harvey P. Dale, Apr 05 2025 *)

CROSSREFS