OFFSET
1,2
COMMENTS
The sequence of words is: en, otte, elleve, atten, enogtyve, otteogtyve, enogtredive, otteogtredive, enogfyrre, otteogfyrre, enoghalvtreds, otteoghalvtreds, enogtreds, otteogtreds, enoghalvfjerds, ...
LINKS
Halfdan Skjerning, Table of n, a(n) for n = 1..150
Brady Haran and Tom Scott, 58 and other Confusing Numbers, Numberphile video (2015)
Wikipedia, List of numbers in various languages
FORMULA
All numbers beginning with '1' or '8', except for two-digit numbers that do not end in '1' or '8'.
MATHEMATICA
Select[Range@ 149, With[{d = IntegerDigits@ #}, MemberQ[{1, 8}, If[Length@ d == 2, First@ Reverse@ d, First@ d]]] &] (* Michael De Vlieger, Aug 30 2017 *)
CROSSREFS
KEYWORD
nonn,easy,word
AUTHOR
Halfdan Skjerning, Aug 29 2017
STATUS
approved