A241812 - OEIS

A241812

Triangular numbers which have one or more occurrences of exactly ten different digits.

1062489753, 1239845706, 1256984730, 1520843976, 1539264870, 1597283460, 1684930275, 1952843760, 1957346028, 1978236450, 2197480365, 2367098415, 2418079653, 2503948761, 2634980715, 2718609453, 2735891406, 2750483196, 2764518903, 2854316790, 2915768430

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OFFSET

1,1

COMMENTS

The first term having a repeated digit is a(83) = 10075823946.

Superset of A115940. - R. J. Mathar, May 02 2014

LINKS

Charles R Greathouse IV, Table of n, a(n) for n = 1..10000

MATHEMATICA

Select[Table[(n(n+1))/2, {n, 45000, 100000}], Min[DigitCount[#]]>0&] (* Harvey P. Dale, Jul 26 2014 *)

PROG

(PARI) s=[]; for(n=0, 100000, if(#vecsort(eval(Vec(Str(n*(n+1)/2))), , 8)==10, s=concat(s, n*(n+1)/2))); s