OFFSET
1,1
LINKS
Amiram Eldar, Table of n, a(n) for n = 1..10000 (terms 1..2620 from Zak Seidov)
Roger B. Eggleton and James A. MacDougall, Consecutive integers with equally many principal divisors, Math. Mag. 81 (2008), 235-248.
EXAMPLE
The numbers from 91 to 96 all have 2 distinct prime factors: 91=7*13, 92=2^2*23, 93=3*31, 94=2*47, 95=5*19, and 96=2^5*3.
MATHEMATICA
Select[Range[35000], Length[Union[Length/@FactorInteger[Range[#, #+5]]]]==1&] (* Harvey P. Dale, Feb 27 2011 *)
CROSSREFS
KEYWORD
nonn
AUTHOR
STATUS
approved