for i in range(0, 1000):
  print(c.BEL(i))
1
5
5
5
9
9
9
13
13
13
17
17
17

irb(main):021:0> def bel n
irb(main):022:1>   4 * (n + 2) / 3 | 1
irb(main):023:1> end

(0..1000).each { |n| puts bel n }

3
5
5
7
9
9
11
13
13
15
17
17
19

def bel_asm(n)
  ax = n
  cx = ax + 2
  dx = 1431655766
  ax = cx
  dx, ax = ax * dx
  ax = cx
  ax >>= 31
  dx -= ax
  ax = dx
  ax <<= 2
  ax += 1
  return ax
end

def CoolApk::Token.bel(n)
  (4 * (n - 1) / 3 | 3) + 2
end