A115678 Triangular numbers whose digit reversal is a brilliant number (A078972).

6, 120, 946, 1540, 7021, 13366, 14365, 15400, 19306, 35245, 72010, 95266, 156520, 179101, 191890, 334153, 341551, 913276, 925480, 933661, 946000, 1008910, 1030330, 1131760, 1383616, 1945378, 3066526, 3156328, 3308878, 3584503

Offset: 1

Author

Giovanni Resta, Jan 31 2006

Keywords

• nonn
• base

Examples

			946=T(43) and 649=11*59 is brilliant.
		

Links

• Harvey P. Dale, Table of n, a(n) for n = 1..1000

Crossrefs

Cf. A078972, A115677.

Programs

Mathematica

bnoQ[n_]:=Module[{f=Transpose[FactorInteger[n]][[1]]},PrimeOmega[n] == 2 && IntegerLength[f[[1]]]==IntegerLength[f[[2]]]]; Select[Accumulate[Range[3000]], bnoQ[FromDigits[Reverse[IntegerDigits[#]]]]&] (* Harvey P. Dale, Feb 21 2013 *)