Number of coincidence site modules of index 10n+1 with 10-fold symmetry in plane.

Terms

a(0) =1a(1) =4a(2) =0a(3) =4a(4) =4a(5) =0a(6) =4a(7) =4a(8) =0a(9) =0a(10) =4a(11) =0a(12) =8a(13) =4a(14) =0a(15) =4a(16) =0a(17) =0a(18) =4a(19) =4a(20) =0a(21) =4a(22) =0a(23) =0a(24) =4a(25) =4a(26) =0a(27) =4a(28) =4a(29) =0