A132386 - OEIS

%I #10 Nov 30 2019 09:22:46

%S 13,180,2460,10500,133560,2827440,27387360,203963760,2254412160,

%T 19260521280,233956522800,2570029862400,33892268810400,

%U 312098001415200,2636529385089600,17906040558806400,307146357004687200,1832625489772677600,29247206795963956800,387955596028816015200

%N Sum of all n-digit superabundant numbers.

%H Eric Weisstein's World of Mathematics, <a href="http://mathworld.wolfram.com/SuperabundantNumber.html">Superabundant Number</a>.

%e Sum of all 1-digit superabundant numbers is 1 + 2 + 4 + 6 = 13.

%e Sum of all 2-digit superabundant numbers is 12 + 24 + 36 + 48 + 60 = 180.

%e Sum of all 3-digit superabundant numbers is 120 + 180 + 240 + 360 + 720 + 840 = 2460.

%Y Cf. A004394.

%K nonn,base,less

%O 1,1

%A _Parthasarathy Nambi_, Nov 07 2007

%E More terms from _Amiram Eldar_, Nov 30 2019