cp's OEIS Frontend

A075031 a(n) is the smallest number k such that the number of divisors of the n numbers from k through k+n-1 are nonincreasing.

%I A075031 #16 Mar 27 2019 18:40:39
%S A075031 1,2,20,20,714,714,25550,90180,142803,809300,27195648,27195648,
%T A075031 6973441007,37962822225,37962822225,114296059262,265228019405583,
%U A075031 394047434860662,2493689139940250
%N A075031 a(n) is the smallest number k such that the number of divisors of the n numbers from k through k+n-1 are nonincreasing.
%C A075031 tau(k) >= tau(k+1) >= ... >= tau(k+n-1).
%C A075031 Next term is > 2000000. - _David Wasserman_, May 06 2005
%C A075031 a(17) > 10^12. [_Donovan Johnson_, Oct 13 2009]
%C A075031 a(20) > 2.64x10^15. - _Jud McCranie_, Mar 27 2019
%e A075031 a(3)=a(4) = 20 as tau(20) > tau(21) = tau(22) > tau(23).
%Y A075031 Cf. A075028, A075029, A075046.
%K A075031 nonn,more
%O A075031 1,2
%A A075031 _Amarnath Murthy_, Sep 02 2002
%E A075031 More terms from Antonio G. Astudillo (afg_astudillo(AT)lycos.com), Apr 19 2003
%E A075031 a(11)-a(16) from _Donovan Johnson_, Oct 13 2009
%E A075031 a(17)-a(19) from _Jud McCranie_, Mar 27 2019