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.

A049052 Numbers k such that k through k+5 all have the same number of divisors.

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%I A049052 #28 Apr 11 2024 04:02:08
%S A049052 28374,90181,157493,171893,171894,180965,180966,210133,298694,346502,
%T A049052 369061,376742,610310,647381,647382,707286,729542,769862,1039493,
%U A049052 1039494,1071829,1071830,1243541,1302005,1449605,1450261,1450262
%N A049052 Numbers k such that k through k+5 all have the same number of divisors.
%H A049052 Amiram Eldar, <a href="/A049052/b049052.txt">Table of n, a(n) for n = 1..10000</a> (terms 1..1000 from Donovan Johnson)
%t A049052 SequencePosition[DivisorSigma[0,Range[1451000]],{x_,x_,x_,x_,x_,x_}][[All,1]] (* Requires Mathematica version 10 or later *) (* _Harvey P. Dale_, Nov 03 2020 *)
%Y A049052 Cf. A000005, A006558, A019273, A119479.
%Y A049052 Other runs of equidivisor numbers: A005237 (runs of 2), A005238 (runs of 3), A006601 (runs of 4), A049051 (runs of 5), A049053 (runs of 7).
%K A049052 nonn
%O A049052 1,1
%A A049052 _David W. Wilson_