Source code in the basic256 programming language

print "The first 20 Hamming numbers are :"
for i = 1 to 20
    print Hamming(i);" ";
next i

print
print "H( 1691) = "; Hamming(1691)
end

function min(a, b)
    if a < b then return a else return b
end function

function Hamming(limit)
    dim h(1000000)

    h[0] = 1
    x2 = 2 : x3 = 3 : x5 = 5
    i  = 0 : j  = 0 : k  = 0
    for n = 1 to limit
        h[n]  = min(x2, min(x3, x5))
        if x2 = h[n] then i += 1: x2 = 2 *h[i]
        if x3 = h[n] then j += 1: x3 = 3 *h[j]
        if x5 = h[n] then k += 1: x5 = 5 *h[k]
    next n
    return h[limit -1]
end function