A072386 Primes which can be represented as the sum of a triangular number and its reverse.

2, 11, 281, 21701, 42923, 72227, 73037, 78887, 79697, 100109, 119891, 122321, 128981, 138683, 178697, 1360631, 1394831, 1591841, 1598951, 1607051, 1958591, 1982891, 2188811, 2401031, 2490941, 2793071, 3382733, 3555443, 3586853

Offset: 1

Author

Shyam Sunder Gupta, Jul 20 2002

Keywords

• base
• nonn

Examples

			11 is a term because it is prime and it is the sum of triangular number 10 and its reverse 01.
		

Programs

Mathematica

Take[Select[Union[#+IntegerReverse[#]&/@Accumulate[Range[ 5000]]], PrimeQ],30] (* Requires Mathematica version 10 or later *)  (* Harvey P. Dale, Aug 29 2016 *)