A195419 - OEIS

%I #11 Aug 13 2020 14:02:28

%S 8,18,27,28,33,34,36,37,38,44,46,47,48,49,57,58,68,75,76,77,78,81,82,

%T 83,85,86,87,88,89,94,96,97,98,99

%N Roman Friedman numbers

%C All numbers ending in 8 are Roman Friedman numbers.

%H Erich Friedman, <a href="https://erich-friedman.github.io/mathmagic/0800.html">Problem of the Month August 2000</a>

%e 8 = VIII = IV * II, 18 = XVIII = IV * II + X. - _Bo Gyu Jeong_, Jun 30 2012

%K nonn,base

%O 1,1

%A _Kausthub Gudipati_, Sep 18 2011