A061861 First two significant digits of 1/n written in decimal.

10, 50, 33, 25, 20, 16, 14, 12, 11, 10, 90, 83, 76, 71, 66, 62, 58, 55, 52, 50, 47, 45, 43, 41, 40, 38, 37, 35, 34, 33, 32, 31, 30, 29, 28, 27, 27, 26, 25, 25, 24, 23, 23, 22, 22, 21, 21, 20, 20, 20, 19, 19, 18, 18, 18, 17, 17, 17, 16, 16, 16, 16, 15, 15, 15, 15, 14, 14, 14

Offset

1,1

Comments

After 10^k terms the number of times m will have appeared will be about 10^(k+2)/(9*m*(m+1)); e.g., 10 will appear just over 10.1% of the time.

Links

Table of n, a(n) for n=1..69.

Formula

a(n) = floor(10^floor(2+log_10(n-1))/n).

Example

a(32)=31 since 1/32 = 0.0312500000...

Mathematica

Table[FromDigits[RealDigits[1/n, 10, 2][[1]]], {n, 70}] (* Harvey P. Dale, Jan 19 2018 *)

Crossrefs

Cf. A033420, A033421, A052038.

Sequence in context: A274561 A253221 A222633 * A243226 A283237 A036786

Adjacent sequences: A061858 A061859 A061860 * A061862 A061863 A061864

Keyword

base,nonn

Author

Henry Bottomley, May 11 2001

Status

approved