OFFSET
1,1
COMMENTS
a(n) = 0 if n is a multiple of 11, 101, 271, 999 or 4649. - Robert Israel, Feb 14 2024
LINKS
Robert Israel, Table of n, a(n) for n = 1..10000
MAPLE
unfinished:= true: V:= Vector(1000): V0:= select(t -> igcd(t, 11*101*271*4649) = 1 and t mod 999 <> 0, {$1..1000}):
for i1 from 0 while unfinished do
for i2 from 0 to i1 while unfinished do
for i3 from 0 to i2 while unfinished do
for i4 from 0 to i3 while unfinished do
for i5 from 0 to i4 while unfinished do
for i6 from 0 to i5 while unfinished do
for i7 from 0 to i6 while unfinished do
for i8 from 0 to i7 while unfinished do
for i9 from 0 to i8 while unfinished do
v:= 10^i1 + 10^i2 + 10^i3 + 10^i4 + 10^i5 + 10^i6 + 10^i7 + 10^i8 + 10^i9;
dv:= numtheory:-divisors(v);
for s in V0 intersect dv do
V[s]:= v;
od;
V0:= V0 minus dv;
unfinished:= evalb(V0 <> {});
od od od od od od od od od:
convert(V, list); # Robert Israel, Feb 14 2024
CROSSREFS
KEYWORD
base,nonn
AUTHOR
Amarnath Murthy, Apr 01 2002
EXTENSIONS
More terms from Sascha Kurz, Apr 08 2002
STATUS
approved