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A241790 Triangular numbers which have one or more occurrences of exactly seven different digits. 7

%I

%S 1024596,1047628,1053426,1069453,1073845,1078246,1203576,1234806,

%T 1345620,1360425,1362075,1386945,1390278,1405326,1430586,1439056,

%U 1462905,1486950,1493856,1547920,1549680,1590436,1602945,1624503,1642578,1679028,1684530,1693720

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

%C The first term having a repeated digit is 10149765.

%H Colin Barker, <a href="/A241790/b241790.txt">Table of n, a(n) for n = 1..2000</a>

%o (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

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

%Y Cf. A000217.

%K nonn,base

%O 1,1

%A _Colin Barker_, Apr 28 2014

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Last modified August 1 14:40 EDT 2021. Contains 346391 sequences. (Running on oeis4.)