Using Arrays within an Array...?

Projects Programming
2

If the subset is fixed to 5 elements, it is like this:

int LEDpins[][5]=
{
  {1,2,3,4,5},
  {6,7,8,9,10},
  {11,12,13,14,15},
};

i = LEDpins[2,1];    // i = 12