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A236404
Numbers not in A203565.
3
22, 23, 24, 25, 26, 27, 28, 29, 32, 33, 34, 35, 36, 37, 38, 39, 42, 43, 44, 45, 46, 47, 48, 49, 52, 53, 54, 55, 56, 57, 58, 59, 62, 63, 64, 65, 66, 67, 68, 69, 72, 73, 74, 75, 76, 77, 78, 79, 82, 83, 84, 85, 86, 87, 88, 89, 92, 93, 94, 95, 96, 97, 98, 99, 122, 123, 124, 125, 127, 128, 129, 132, 133, 134, 135, 136, 137, 138, 139, 142, 143, 144, 145, 146
OFFSET
1,1
LINKS
MAPLE
filter:= proc(n) local L, d, i, p, np;
L:= convert(n, base, 10);
d:= nops(L);
for i from 1 to d-1 do
p:= convert(L[i]*L[i+1], base, 10);
np:= nops(p);
if andmap(j -> L[j..j+np-1] <> p, [$1..d-np+1]) then return true fi
od;
false
end proc:
select(filter, [$1..200]); # Robert Israel, Oct 18 2023
CROSSREFS
KEYWORD
nonn,base
AUTHOR
N. J. A. Sloane, Jan 30 2014
STATUS
approved