OFFSET
1,1
COMMENTS
The first term having a repeated digit is 10153.
LINKS
Colin Barker, Table of n, a(n) for n = 1..2000
MATHEMATICA
Select[Accumulate[Range[200]], Count[DigitCount[#], 0]==6&] (* Harvey P. Dale, Jun 29 2022 *)
PROG
(PARI) s=[]; for(n=0, 300, if(#vecsort(eval(Vec(Str(n*(n+1)/2))), , 8)==4, s=concat(s, n*(n+1)/2))); s
CROSSREFS
KEYWORD
nonn,base
AUTHOR
Colin Barker, Apr 28 2014
STATUS
approved