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A132386
Sum of all n-digit superabundant numbers.
0
13, 180, 2460, 10500, 133560, 2827440, 27387360, 203963760, 2254412160, 19260521280, 233956522800, 2570029862400, 33892268810400, 312098001415200, 2636529385089600, 17906040558806400, 307146357004687200, 1832625489772677600, 29247206795963956800, 387955596028816015200
OFFSET
1,1
LINKS
Eric Weisstein's World of Mathematics, Superabundant Number.
EXAMPLE
Sum of all 1-digit superabundant numbers is 1 + 2 + 4 + 6 = 13.
Sum of all 2-digit superabundant numbers is 12 + 24 + 36 + 48 + 60 = 180.
Sum of all 3-digit superabundant numbers is 120 + 180 + 240 + 360 + 720 + 840 = 2460.
CROSSREFS
Cf. A004394.
Sequence in context: A197198 A295119 A196956 * A127390 A142646 A201607
KEYWORD
nonn,base,less
AUTHOR
Parthasarathy Nambi, Nov 07 2007
EXTENSIONS
More terms from Amiram Eldar, Nov 30 2019
STATUS
approved