Number of (n+2) X 8 0..2 matrices with each 3 X 3 subblock idempotent.

Terms

a(0) =1045a(1) =894a(2) =1086a(3) =1247a(4) =1609a(5) =2092a(6) =2656a(7) =3497a(8) =4731a(9) =6434a(10) =8878a(11) =12451a(12) =17617a(13) =25112a(14) =36060a(15) =52049a(16) =75403a(17) =109570a(18) =159586a(19) =232811a(20) =340053a(21) =497156a(22) =727324a(23) =1064569a(24) =1558747a(25) =2282918a(26) =3344154a(27) =4899383a(28) =7178593a(29) =10518844