A121060 Sum of the first n digits to the right of the decimal expansion of 1/n.

0, 5, 9, 7, 2, 31, 28, 8, 9, 1, 45, 38, 54, 61, 84, 13, 72, 85, 81, 5, 92, 94, 99, 131, 4, 111, 90, 123, 126, 87, 108, 11, 48, 146, 157, 240, 108, 164, 115, 7, 144, 184, 180, 191, 88, 200, 207, 142, 204, 2, 217, 228, 252, 247, 243, 249, 251, 253, 261, 349, 270, 217, 246

Offset

1,2

Comments

First occurrence of k or -1 if not present: 1, 10, 5, -1, 25, 2, -1, 4, 8, 3, -1, 32, -1, 16, -1, -1, -1, -1, -1, 64, -1, -1, -1, 128, -1, 256, ..., . - Robert G. Wilson v, Aug 17 2006

Links

Table of n, a(n) for n=1..63.

Example

a(2)=5 because 1/2 = 0.50 and 5 + 0 = 5.
a(3)=9 because 1/3 = 0.3333... and 3 + 3 + 3 = 9.
a(7)=28 because 1/7 = 0.14285714285714... and 1 + 4 + 2 + 8 + 5 + 7 + 1 = 28.

Mathematica

f[n_] := If[n == 1, 0, Plus @@ IntegerDigits[Floor[10^n/n]]]; Array[f, 63] (* Robert G. Wilson v, Aug 17 2006 *)

Crossrefs

Sequence in context: A349220 A240723 A254154 * A230437 A199607 A233382

Adjacent sequences: A121057 A121058 A121059 * A121061 A121062 A121063

Keyword

nonn,base

Author

Gil Broussard, Aug 09 2006

Status

approved