A Simple Sequence

The numbers in this sequence appear to be all multiples of $3$ . By dividing all the numbers of this sequence by $3$ , we get: $1,4,9,16,25...$ The square numbers. Thus we can deduce that the next term will be the ${ 6 }^{ th }$ square number term multiplied by $3$ . Therefore, the answer is $36\times 3=108$