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A241788
Triangular numbers which have one or more occurrences of exactly five different digits.
7
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
1,1
COMMENTS
The first term having a repeated digit is 100576.
LINKS
PROG
(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
KEYWORD
nonn,base
AUTHOR
Colin Barker, Apr 28 2014
STATUS
approved