A108909 Sum of k-digit multiples of n where k is the number of digits in n.

45, 20, 18, 12, 5, 6, 7, 8, 9, 450, 495, 432, 364, 392, 315, 336, 255, 270, 285, 200, 210, 220, 230, 240, 150, 156, 162, 168, 174, 180, 186, 192, 198, 102, 105, 108, 111, 114, 117, 120, 123, 126, 129, 132

Offset

1,1

Links

Table of n, a(n) for n=1..44.

Example

a(12) = 12 +24 +...+84 +96= 432.

Crossrefs

Sequence in context: A070818 A285893 A129536 * A033365 A196093 A196090

Adjacent sequences: A108906 A108907 A108908 * A108910 A108911 A108912

Keyword

base,easy,nonn

Author

Amarnath Murthy, Jul 19 2005

Status

approved