OFFSET
1,1
MATHEMATICA
f[n_] := ToString[ FromDigits[ IntegerDigits[n, 2]]]; g[n_] := g[n] = Block[{c = 0, k = 1, s = f[n! ]}, While[k <= n, If[ StringPosition[ s, f[k]] != {}, c++ ]; k++ ]; c]; Complement[ Range[200], Union[ Table[ g[n], {n, 202}]]]
CROSSREFS
KEYWORD
nonn
AUTHOR
Robert G. Wilson v, Apr 21 2004
STATUS
approved