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.

A064041 Number of divisors of A064040(n).

This page as a plain text file.
%I A064041 #13 Jun 22 2018 04:32:51
%S A064041 4,4,6,4,4,6,6,4,4,8,4,6,8,4,4,4,9,4,4,8,8,6,6,4,10,6,4,6,8,4,8,4,4,
%T A064041 12,4,6,4,8,6,4,8,12,4,6,6,4,8,10,4,12,4,4,4,8,12,4,6,4,4,4,12,6,6,9,
%U A064041 8,8,8,4,12,8,4,10,8,4,6,6,4,4,16,4,4,6,12,4,8,12,4,4,8,8,8,12,4,4,4,15,4
%N A064041 Number of divisors of A064040(n).
%H A064041 Harry J. Smith, <a href="/A064041/b064041.txt">Table of n, a(n) for n = 1..1000</a>
%e A064041 a(17) = 9 since 36 is the 17th number with prime number of prime divisors and 36 is divisible by 9 numbers.
%o A064041 (PARI) { n=0; for (m=1, 10^9, if (isprime(omega(m)), write("b064041.txt", n++, " ", numdiv(m)); if (n==1000, break)) ) } \\ _Harry J. Smith_, Sep 06 2009
%Y A064041 Cf. A064040.
%K A064041 nonn
%O A064041 1,1
%A A064041 _Lior Manor_, Aug 23 2001