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A072386
Primes which can be represented as the sum of a triangular number and its reverse.
1
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
1,1
EXAMPLE
11 is a term because it is prime and it is the sum of triangular number 10 and its reverse 01.
MATHEMATICA
Take[Select[Union[#+IntegerReverse[#]&/@Accumulate[Range[ 5000]]], PrimeQ], 30] (* Requires Mathematica version 10 or later *) (* Harvey P. Dale, Aug 29 2016 *)
CROSSREFS
Sequence in context: A132571 A102031 A248865 * A185122 A350932 A369947
KEYWORD
base,nonn
AUTHOR
Shyam Sunder Gupta, Jul 20 2002
STATUS
approved