creates fractal sequence

ones.xcplayground

import UIKit
import XCPlayground

// 500-1000, 1-100
func seq(length: Int, sampleRate: Int) -> [Int] {
    var s = [Int]()
    for i in 0..<length {
        s.append((i * sampleRate).nonzeroBitCount)
    }
    return s
}

seq(length: 50, sampleRate: 37).map({ $0 })