A241790 Triangular numbers which have one or more occurrences of exactly seven different digits.

1024596, 1047628, 1053426, 1069453, 1073845, 1078246, 1203576, 1234806, 1345620, 1360425, 1362075, 1386945, 1390278, 1405326, 1430586, 1439056, 1462905, 1486950, 1493856, 1547920, 1549680, 1590436, 1602945, 1624503, 1642578, 1679028, 1684530, 1693720

Offset: 1

Author

Colin Barker, Apr 28 2014

Keywords

• nonn
• base

Comments

The first term having a repeated digit is 10149765.

Links

• Colin Barker, Table of n, a(n) for n = 1..2000

Crossrefs

Cf. A045914, A062691, A162304, A241787, A241788, A241789, A241791, A241792, A241812.

Cf. A000217.

Programs

PARI

s=[]; for(n=0, 2500, if(#vecsort(eval(Vec(Str(n*(n+1)/2))), , 8)==7, s=concat(s, n*(n+1)/2))); s