1 3 9 27 next number July 8, 2019 16 32 64 128 1 3 9 27 number sequence 1 3 9 27 odd numbers 1 3 9 27 prime numbers What number comes next 1 3 9 27 __ Next number in pattern 1 3 9 27 1 3 9 27 pattern rule 1 2 3 number song