Question

Write down the next term in this sequence: -1 3 11 23 39

PLEASE EXPLAIN XOXOXOXXOOXX

Answer 1

Is it OK if I explain it before I write down the next term ?


-1 ___ 3 ___ 11 ___ 23 ___ 39 ___ ( )

The first blank is . . . . . " + 4 = " .

The second blank is . . " + 8 = " .

The third blank is . . . . " + 12 = " .

The fourth blank is . . . " + 16 = " .

So the fifth blank is . . . " + 20 = " and the next number is 59 .