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

1,1

Links

Table of n, a(n) for n=1..35.

Example

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

Crossrefs

Cf. A000217, A077671, A095869, A095870.

Sequence in context: A114823 A069790 A064224 * A003015 A098565 A084142

Adjacent sequences: A069671 A069672 A069673 * A069675 A069676 A069677

Keyword

nonn,base

Author

Amarnath Murthy, Apr 06 2002

Extensions

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

Offset changed to 1 by Jinyuan Wang, Aug 06 2021

Status

approved