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%I A117834 #7 Oct 09 2023 03:21:01
%S A117834 0,1,3,6,10,21,45,78,210
%N A117834 Triangular numbers with consecutive digits.
%C A117834 Digits can be in ascending or descending order. After 9 comes 0.
%C A117834 Next term, if there is one, has more than 300 digits. - _Joshua Zucker_, May 11 2006
%C A117834 Terms correspond to (some) integral points on a finite number of Mordell curves. Thus there is only a finite number of terms. It is likely that no other terms besides those listed exist. - _Max Alekseyev_, Oct 08 2023
%Y A117834 Cf. A000217.
%K A117834 base,fini,more,nonn
%O A117834 1,3
%A A117834 Luc Stevens (lms022(AT)yahoo.com), Apr 30 2006

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