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 A175116 A positive integer k is included if d(k) = d(k+1) * d(k+2), where d(k) is the number of divisors of k. 4

%I

%S 96,105,165,216,280,315,345,357,408,465,522,552,561,616,624,640,696,

%T 744,760,837,861,885,920,924,945,990,1032,1056,1128,1185,1281,1302,

%U 1368,1386,1416,1464,1560,1640,1785,1830,1860,1905,1950,2037,2142,2184,2296

%N A positive integer k is included if d(k) = d(k+1) * d(k+2), where d(k) is the number of divisors of k.

%C Terms calculated by _M. F. Hasler_.

%H Amiram Eldar, <a href="/A175116/b175116.txt">Table of n, a(n) for n = 1..10000</a>

%t Transpose[Select[Partition[Range[3000],3,1],DivisorSigma[0,First[#]]== DivisorSigma[0,Last[#]]DivisorSigma[0,#[[2]]]&]][[1]] (* _Harvey P. Dale_, Apr 08 2011 *)

%Y Cf. A000005, A175115, A145470.

%K nonn

%O 1,1

%A _Leroy Quet_, Feb 13 2010

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Last modified May 25 17:19 EDT 2020. Contains 334595 sequences. (Running on oeis4.)