A241791 Triangular numbers which have one or more occurrences of exactly eight different digits.

10348975, 10623745, 10725396, 10869453, 10934826, 12347965, 12357906, 12487503, 12647935, 12673095, 12784096, 13862745, 14756028, 14826735, 15237960, 15298746, 15304278, 15879430, 16247850, 16384950, 17084935, 17502486, 17543926, 17829406

Offset

1,1

Comments

The first term having a repeated digit is 100642578.

Links

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

Mathematica

Select[Accumulate[Range[7000]], Length[Union[IntegerDigits[#]]]==8&] (* Harvey P. Dale, Feb 09 2019 *)

Prog

(PARI) s=[]; for(n=0, 7000, if(#vecsort(eval(Vec(Str(n*(n+1)/2))), , 8)==8, s=concat(s, n*(n+1)/2))); s

Crossrefs

Cf. A045914, A062691, A162304, A241787, A241788, A241789, A241790, A241792, A241812.

Cf. A000217.

Sequence in context: A061407 A152155 A159837 * A234198 A186921 A185805

Adjacent sequences: A241788 A241789 A241790 * A241792 A241793 A241794

Keyword

nonn,base

Author

Colin Barker, Apr 28 2014

Status

approved