A157964 - OEIS

A157964

Consider the English number names for numbers from 1 to n, sorted in lexicographic order: the number name for a(n) gives the median in this list.

1, 1, 3, 1, 1, 1, 7, 1, 1, 1, 1, 1, 7, 1, 1, 1, 7, 1, 1, 1, 7, 7, 17, 17, 6, 6, 16, 16, 10, 10, 13, 13, 30, 30, 35, 35, 34, 35, 34, 35, 35, 38, 38, 30, 30, 13, 13, 10, 10, 16, 16, 6, 6, 17, 17, 7, 7, 1, 1, 1, 7, 7, 17, 17, 6, 6, 16, 16, 60, 16, 16, 6, 6, 72, 72, 73, 73, 76, 76, 77, 77, 71

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,3

COMMENTS

0 <= #{i: 1<=i<=n and ENW(i)<=ENW(a(n))} - #{i: 1<=i<=n and ENW(i)>ENW(a(n))} <= 1, where ENW(n) = number word for n in English.

LINKS

R. Zumkeller, Table of n, a(n) for n = 1..1000

Wikipedia, Median

Robert G. Wilson v, English names for the numbers from 0 to 11159 without spaces or hyphens

EXAMPLE

a(7)=7 ->seven: five<four<one<[seven]<six<three<two;

a(8)=1 ->one: eight<five<four<[one]<seven<six<three<two;