A137601 - OEIS

A137601

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

1, 2, 3902496

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OFFSET

1,2

COMMENTS

Next term is greater than 135*10^7.

a(4) > 4*10^12. - Giovanni Resta, Apr 09 2017

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