A064431 - OEIS

%I #9 Dec 15 2017 17:35:39

%S 6,21,38,44,45,81,164,261,278,4388,9009,114302,41623514,440169957,

%T 19033618221,175036435525,341846222877

%N Numbers n such that |A053222(n)| = tau(n).

%o (PARI) t(n) = abs(sigma(n+1)-sigma(n)) for(n=1,10^6, if(t(n)==numdiv(n),print(n)))

%K more,nonn

%O 1,1

%A _Jason Earls_, Sep 30 2001

%E a(13)-a(17) from _Giovanni Resta_, Feb 08 2014