OFFSET
1,1
LINKS
Nathaniel Johnston, Table of n, a(n) for n = 1..10000
Omar E. Pol, Illustration: Divisors and pi(x)
MAPLE
p2:=2:for n from 1 to 78 do p1:=p2:p2:=ithprime(n+1):if(p2-p1<>tau(n))then print(n); fi:od: # Nathaniel Johnston, Apr 15 2011
CROSSREFS
KEYWORD
easy,nonn
AUTHOR
Omar E. Pol, Jul 04 2009
STATUS
approved