cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

A381218 Odd numbers with both an odd number of prime factors (counted with multiplicity) and an odd number of distinct prime factors. (Intersection of A067019 and A098903.)

This page as a plain text file.
%I A381218 #8 Feb 17 2025 13:01:58
%S A381218 3,5,7,11,13,17,19,23,27,29,31,37,41,43,47,53,59,61,67,71,73,79,83,89,
%T A381218 97,101,103,105,107,109,113,125,127,131,137,139,149,151,157,163,165,
%U A381218 167,173,179,181,191,193,195,197,199,211,223,227,229,231,233,239
%N A381218 Odd numbers with both an odd number of prime factors (counted with multiplicity) and an odd number of distinct prime factors. (Intersection of A067019 and A098903.)
%H A381218 Harvey P. Dale, <a href="/A381218/b381218.txt">Table of n, a(n) for n = 1..1000</a>
%t A381218 Select[Range[1,301,2],AllTrue[{PrimeOmega[#],PrimeNu[#]},OddQ]&]
%Y A381218 Cf. A067019, A098903
%K A381218 nonn,easy
%O A381218 1,1
%A A381218 _Harvey P. Dale_, Feb 17 2025