%N a(n) = the number of divisors of n that are each not coprime to the previous or the following divisor of n.
%H Diana Mecum, <a href="/A136166/b136166.txt">Table of n, a(n) for n = 1..1000</a>
%e The divisors of 28 are 1,2,4,7,14,28. Among adjacent pairs of divisors, 1 and 2 are coprime and 4 and 7 are coprime. Therefore there are a(28) =5 divisors that are each next to at least one divisor they are not coprime to. (These five divisors are 2,4,7,14,28.)
%Y Cf. A136164, A136165, A136167.
%A _Leroy Quet_, Dec 17 2007
%E More terms from _Diana L. Mecum_, Jul 13 2008