A130719 a(n) = n-th digit after the decimal point of the decimal representation of the n-th harmonic number.

0, 0, 3, 3, 3, 0, 1, 4, 3, 9, 7, 0, 7, 2, 3, 2, 3, 0, 4, 8, 1, 8, 4, 3, 6, 1, 1, 6, 9, 4, 4, 0, 9, 1, 3, 7, 1, 4, 2, 6, 0, 6, 0, 2, 3, 5, 2, 9, 4, 5, 3, 6, 7, 8, 4, 3, 5, 3, 3, 5, 0, 5, 2, 1, 0, 2, 0, 8, 8, 7, 0, 0, 1, 7, 9, 9, 8, 5, 1, 0

Offset

1,3

Links

Table of n, a(n) for n=1..80.

Eric Weisstein's World of Mathematics, Harmonic Series.

Example

a(7) = 1 because the 7th harmonic number is 1/1+1/2+1/3+1/4+1/5+1/6+1/7 = 2.592857143... and 1 is the 7th digit after the decimal point.

Mathematica

Table[Last[RealDigits[HarmonicNumber[n], 10, n+1][[1]]], {n, 80}] (* Harvey P. Dale, Nov 28 2013 *)

Crossrefs

Sequence in context: A002073 A247093 A329273 * A143606 A126660 A202698

Adjacent sequences: A130716 A130717 A130718 * A130720 A130721 A130722

Keyword

base,nonn

Author

Stephen Casey (hexomino(AT)gmail.com), Jul 03 2007

Status

approved