OFFSET
1,1
COMMENTS
Subsequence of A088723.
The numbers of terms not exceeding 10^k, for k = 1, 2, ..., are 1, 10, 100, 976, 9712, 97140, 971139, 9711054, 97109111, 971091745, ... . Apparently, the asymptotic density of this sequence exists and equals 0.097109... . - Amiram Eldar, Jul 09 2022
LINKS
Harvey P. Dale, Table of n, a(n) for n = 1..1000
FORMULA
A088722(a(n)) = 1.
MATHEMATICA
Select[Range[600], Count[Differences[Rest[Divisors[#]]], 1]==1&] (* Harvey P. Dale, Sep 05 2015 *)
CROSSREFS
KEYWORD
nonn
AUTHOR
Reinhard Zumkeller, Oct 12 2003
EXTENSIONS
Extended by Ray Chandler, May 29 2008
STATUS
approved