OFFSET
1,1
COMMENTS
All terms == 0, 2, 4, 5, 7, or 9 (mod 10).
LINKS
Robert Israel, Table of n, a(n) for n = 1..10000
EXAMPLE
a(4) = 9 is a term because 9*10 = 90 does not contain the digit 2.
MAPLE
remove(t -> member(2, convert(t*(t+1), base, 10)), [$1..1000]);
CROSSREFS
KEYWORD
nonn,base
AUTHOR
Robert Israel, Feb 12 2023
STATUS
approved