94718domain: NAppears in sequencesCycle class sequence c(n) (the number of true cycles of length n in which a certain node is included) for zeolite NAT = Natrolite Na16[Al16Si24O80].16H2O starting from a T1 atom.at n=15A019200Number of positive integers <= 2^n of form 4 x^2 + 7 y^2.at n=20A054171