A046443 - OEIS

A046443

Composite numbers whose 3 prime factors are distinct in length.

2222, 2266, 2354, 2398, 2486, 2626, 2678, 2782, 2794, 2834, 2882, 2938, 3014, 3058, 3278, 3302, 3322, 3333, 3399, 3406, 3434, 3454, 3502, 3531, 3562, 3586, 3597, 3614, 3638, 3674, 3706, 3729, 3806, 3838, 3842, 3874, 3914, 3926, 3938, 3939, 3982, 4017

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OFFSET

1,1

COMMENTS

Equivalently, the products of 3 prime numbers that have distinct lengths when written in decimal. - Peter Munn, May 30 2023

LINKS

Table of n, a(n) for n=1..42.

EXAMPLE

2882 because 2882 = 2 * 11 * 131, which have 1, 2, and 3 digits, respectively.

CROSSREFS

Subsequence of A007304.

Sequence in context: A260175 A166580 A091189 * A257826 A043500 A118116

Adjacent sequences: A046440 A046441 A046442 * A046444 A046445 A046446

KEYWORD

nonn,base

AUTHOR

Patrick De Geest, Jul 15 1998

STATUS

approved