Fractint formula file:
dna {;
z = pixel:
z = ((exp((exp(z) * exp((((z * atan(((z * atan(sinh(z))) * (z * atan(sinh(z)))))) * ((z * atan(sinh(z))) * atan(sinh(z)))) * atan(sinh(z)))))) * atan(atan(pixel))) * (z * atan(sinh(z)))),
z <= 100
}