313140domain: NAppears in sequencesCycle class sequence c(2n) (the number of true cycles of length 2n in which a certain node is included) for zeolite AFO = AlPO4-41 [Al20P20O80] starting with a T1 atom.at n=7A018959a(n) has generating function 1/((1-x)^k*(1-x^2)^(k*(k-1)/2)) for k=5.at n=13A181477