cp's OEIS Frontend

A364717 Numbers k such that d(k) < d(k+1) < d(k+2) < d(k+3) < d(k+4), where d(n) is the number of divisors of n.

%I A364717 #7 Aug 04 2023 08:15:47
%S A364717 11371,11372,35521,38281,45613,48121,50821,50822,52321,52322,54421,
%T A364717 54422,59341,59342,71821,79621,86873,87181,117841,125737,127852,
%U A364717 130021,130022,132051,132206,133396,151082,153221,173221,180001,184973,186481,195541,195542,196171,196172
%N A364717 Numbers k such that d(k) < d(k+1) < d(k+2) < d(k+3) < d(k+4), where d(n) is the number of divisors of n.
%o A364717 (PARI) isok(n) = numdiv(n)<numdiv(n+1) && numdiv(n+1)<numdiv(n+2) && numdiv(n+2)<numdiv(n+3) && numdiv(n+3)<numdiv(n+4);
%Y A364717 Cf. A000005, A075028, A364720.
%Y A364717 Cf. A074775, A364715, A364716.
%K A364717 nonn
%O A364717 1,1
%A A364717 _Seiichi Manyama_, Aug 04 2023