Number of (n+4)X6 0..2 matrices with each 5X5 subblock idempotent.

Terms

a(0) =20465a(1) =15354a(2) =19596a(3) =22081a(4) =23453a(5) =24252a(6) =31702a(7) =43635a(8) =58076a(9) =73708a(10) =89988a(11) =113491a(12) =148896a(13) =198454a(14) =263524a(15) =344683a(16) =449230a(17) =588930a(18) =778104a(19) =1032073a(20) =1367122a(21) =1806502a(22) =2385414a(23) =3153261a(24) =4175034a(25) =5531556a(26) =7327326a(27) =9701805a(28) =12844004