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.

A045936 Numbers n such that n through n+7 are divisible by the same number of distinct primes.

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%I A045936 #13 Oct 26 2019 03:08:15
%S A045936 141,212,39693,44360,44361,48919,48920,48921,54349,56014,56015,56791,
%T A045936 60044,65721,72650,72651,73292,73293,76581,76582,82324,82325,86331,
%U A045936 86332,87758,87759,90092,91814,91815,99843,106249,112142,112143,121594
%N A045936 Numbers n such that n through n+7 are divisible by the same number of distinct primes.
%H A045936 Amiram Eldar, <a href="/A045936/b045936.txt">Table of n, a(n) for n = 1..10000</a>
%t A045936 npQ[n_]:=Length[Union[Length[FactorInteger[#]]&/@Range[n,n+7]]]==1
%t A045936 Select[Range[125000],npQ]  (* _Harvey P. Dale_, Feb 23 2011 *)
%Y A045936 Cf. A001221, A006049, A006073, A045932-A045935, A045937-A045938.
%K A045936 nonn
%O A045936 1,1
%A A045936 _David W. Wilson_
%E A045936 Offset corrected by _Amiram Eldar_, Oct 26 2019