Number of ferrites M_{10}Y_n that repeat after 6n+50 layers.

Terms

a(0) =0a(1) =3a(2) =5a(3) =18a(4) =38a(5) =100a(6) =198a(7) =445a(8) =829a(9) =1605a(10) =2851a(11) =5014a(12) =8361a(13) =13843a(14) =21907a(15) =34362a(16) =52327a(17) =78571a(18) =115434a(19) =167695