A = 13591409
B = 545140134
C = 640320

k = 1

top = -1^k*fact(6*k)*(A+B*k)
bottom = fact(3*k)*fact(k)^3*C^(3*k+3/2)
a = a + top/bottom

print "top:", top
print "bottom:", bottom
print "pi:", 1 / ( 12 * a)