Numbers whose English name (excluding spaces and hyphens) is written with only straight line segments (chisel strokes).
5, 9, 10, 11, 12, 15, 19, 20, 25, 29, 50, 55, 59, 90, 95, 9
1 seqfan posts
Mon Sep 7 16:31:14 CEST 2009 [seqfan] Ratio of Chisel Strokes in English names and Roman numerals