A115691 Powerful(1) numbers (A001694) whose digit reversal is a triangular number.

1, 100, 1000, 5400, 10000, 54000, 100000, 540000, 1000000, 1306449, 1728243, 5400000, 10000000, 50086125, 54000000, 100000000, 130644900, 172824300, 540000000, 1000000000, 1044000721, 1306449000, 1728243000, 5008612500

Offset: 1

Author

Giovanni Resta, Jan 31 2006

Keywords

• nonn
• base

Examples

			5400=2^3*3^3*5^2 is powerful and 45=T(9).
		

Links

• Index entries for sequences related to powerful numbers

Crossrefs

Cf. A001694, A115692.

Extensions

a(14)-a(24) from Donovan Johnson, Oct 01 2009