RosettaCodeData/Task/Magic-constant/BASIC256/magic-constant.basic

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function a(n)
n = n + 2
return n*(n^2 + 1)/2
end function
function inv_a(x)
k = 0
while k*(k^2+1)/2+2 < x
k += 1
end while
return k
end function
print "The first 20 magic constants are:"
for n = 1 to 20
print int(a(n));" ";
next n
print : print
print "The 1,000th magic constant is "; int(a(1000)); chr(10)
for e = 1 to 20
print "10^"; e; ": "; chr(9); inv_a(10^e)
next e
end