What number comes next in this sequence: 1 4 8 13 21 30 36 ??
1 + one (3 letters) = 4 4 + four (4 letters) = 8 8 + eight (5 letters) = 13 13 + thirteen (8 letters) = 21 21 + twenty one (9 letters) = 30 30 + thirty (6 letters) = 36 36 + thirty six (9 letters) = 45
So answer is 45
45
Take the previous term and take its value and add the number of letters in its English name.