A069674 Triangular numbers whose digit permutations yield at least two further triangular numbers.

120, 210, 1035, 2080, 4095, 4560, 4950, 5460, 9045, 13530, 15400, 17020, 17205, 17578, 19306, 20100, 20503, 20706, 23005, 30135, 30628, 36046, 37401, 40186, 43071, 43660, 46360, 46971, 50721, 51040, 52003, 53301, 60031, 63190, 66430

Offset: 1

Author

Amarnath Murthy, Apr 06 2002

Keywords

• nonn
• base

Examples

			120 yields 21 and 210; 210 yields 21 and 120.
		

Crossrefs

Cf. A000217, A077671, A095869, A095870.

Extensions

Edited, corrected and extended by Ray Chandler, Jun 29 2004

Offset changed to 1 by Jinyuan Wang, Aug 06 2021