A241788 Triangular numbers which have one or more occurrences of exactly five different digits.

10296, 12403, 13695, 14028, 14365, 14706, 16290, 17205, 19306, 19503, 21736, 21945, 23871, 24310, 24531, 24753, 24976, 27495, 29403, 30628, 30876, 32640, 32896, 34716, 34980, 37128, 37401, 37950, 39621, 40186, 41328, 41905, 42195, 43071, 43956, 46971, 47586

Offset: 1

Author

Colin Barker, Apr 28 2014

Keywords

• nonn
• base

Comments

The first term having a repeated digit is 100576.

Links

• Colin Barker, Table of n, a(n) for n = 1..1000

Crossrefs

Cf. A045914, A062691, A162304, A241787, A241789, A241790, A241791, A241792, A241812.

Cf. A000217.

Programs

PARI

s=[]; for(n=0, 500, if(#vecsort(eval(Vec(Str(n*(n+1)/2))), , 8)==5, s=concat(s, n*(n+1)/2))); s