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

Offset: 1

Author

Colin Barker, Apr 29 2014

Keywords

• nonn
• base
• easy

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

Crossrefs

Cf. A045914, A062691, A162304, A241787, A241788, A241789, A241790, A241791, A241792, A000217.

Programs

Mathematica

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

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