A038400 - OEIS

%I #13 May 21 2022 14:01:47

%S 44,45,75,76,98,99,116,117,147,148,171,172,242,243,244,245,332,333,

%T 387,388,507,508,548,549,603,604,605,724,725,844,845,908,909,931,932,

%U 963,964,1075,1076,1083,1084,1251,1252,1324,1325,1412,1413,1467,1468,1556,1557,1587,1588

%N List of pairs of consecutive numbers each with 6 divisors (duplicates removed).

%D David Wells, The Penguin Dictionary of Curious and Interesting Numbers, Penguin Books, p. 103.

%H Harvey P. Dale, <a href="/A038400/b038400.txt">Table of n, a(n) for n = 1..3000</a>

%t SequencePosition[DivisorSigma[0,Range[1600]],{6,6}]//Flatten//Union (* Requires Mathematica version 10 or later *) (* _Harvey P. Dale_, Aug 23 2017 *)

%Y Cf. A049103, A049104.

%K nonn

%O 1,1

%A _Felice Russo_

%E More terms from _Olivier Gérard_