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Triangular numbers whose digits can be rearranged to form a substring of 123456789012345678901234....
3

%I #9 Sep 19 2024 21:41:37

%S 0,1,3,6,10,21,45,78,120,190,210,231,435,465,9180,9870,12403,24310,

%T 24531,47586,109278,231540,235641,246753,327645,541320,542361,921403,

%U 1053426,1345620,1360425,1390278,1405326,1624503,1679028,2098176,2465310,2467531,3049215,3078921

%N Triangular numbers whose digits can be rearranged to form a substring of 123456789012345678901234....

%H Andrew Howroyd, <a href="/A068804/b068804.txt">Table of n, a(n) for n = 1..10000</a>

%e 9180 is a term whose digits can be arranged as 8901.

%e 47586 is a term as its digits can be arranged as 45678.

%Y Intersection of A000217 and A376300.

%Y Cf. A068708.

%K base,nonn

%O 1,3

%A _Amarnath Murthy_, Mar 06 2002

%E More terms from Christopher Lund (clund(AT)san.rr.com), Apr 14 2002

%E Offset changed and a(32) onwards from _Andrew Howroyd_, Sep 19 2024