

A137601


a(n) is the smallest number m such that pi(m)+sigma(m)=n*m.


0




OFFSET

1,2


COMMENTS

Next term is greater than 135*10^7.


LINKS



EXAMPLE

a(3)=3902496 because pi(3902496)+sigma(3902496)=3*3902496 and 3902496 is the smallest such number.


CROSSREFS



KEYWORD

hard,more,nonn,less,bref


AUTHOR



STATUS

approved



