A086705 - OEIS

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A086705

Decimal expansion of a constant related to Niven numbers.

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

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OFFSET

1,3

COMMENTS

The number N(x) of Niven numbers less than x is given by N(x) = (c+o(1))*x/log(x).

LINKS

Table of n, a(n) for n=1..105.

Jean-Marie De Koninck and Nicolas Doyon, Large and Small Gaps Between Consecutive Niven Numbers, J. Integer Seqs., Vol. 6, (2003), Article 03.2.5.

FORMULA

c = (14/27)*log(10).

EXAMPLE

1.1939330111820977620834029765030036632005711422519563579432....