OFFSET
1,1
EXAMPLE
41 is in the list since concatenation of 1, 2 and 3 gives 123/3 = 41. Similarly concatenation of 15, 16 and 17 gives 151617 and 151617/3 = 50539, a prime.
MATHEMATICA
Select[Table[FromDigits[Flatten[IntegerDigits[n + Range[-1, 1]]]]/3, {n, 350}], PrimeQ]
CROSSREFS
KEYWORD
nonn,base
AUTHOR
Jayanta Basu, May 24 2013
STATUS
approved