3 7 5 9 2 July 8, 2019 16 32 64 128 3 7 5 9 1 2 1 3 5 7 9 2n 1 formula 1 3 5 7 9 2n 1 sum formula 1 3 5 7 9 2n 1 9 3 7 * 5 22 3 7 9 2 5 6 2 3 5 7 9 next number 3 7 x 5 9 x 1 2 8 2 3 5 7 9 1 2 3 5 7 9 arithmetic sequence 9 3 7 x 5 22 7 3 2k )+ 9 k 5 3 5 7 9 soma 20 3 5 7 4 9 2 3 2 7 x 5 2 9