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A116490 Numbers that can be written as a product of evil numbers (A001969) and of odious numbers (A000069). 3

%I #7 Mar 27 2021 08:07:07

%S 1,25,50,69,77,81,87,100,115,117,138,145,147,154,162,169,171,174,175,

%T 200,209,213,230,231,234,245,261,265,275,276,285,287,289,290,294,308,

%U 324,325,329,333,338,339,342,343,345,348,350,351,355,357,369,375,385

%N Numbers that can be written as a product of evil numbers (A001969) and of odious numbers (A000069).

%C Numbers such that A116488(n) != 0 and A116489(n) != 0.

%C If m is in the sequence then so is 2*m for m > 1. - _David A. Corneth_, Mar 27 2021

%H David A. Corneth, <a href="/A116490/b116490.txt">Table of n, a(n) for n = 1..12272</a>

%e 77 is in the sequence as it's the product of odious numbers via 7*11 and of evil numbers via 1*77. - _David A. Corneth_, Mar 27 2021

%Y Cf. A000069, A001969, A116489, A116490

%K nonn

%O 1,2

%A _Christian G. Bower_, Feb 17 2006

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Last modified May 14 04:33 EDT 2024. Contains 372528 sequences. (Running on oeis4.)