Number of (n+5)X9 0..2 matrices with each 6X6 subblock idempotent.

Terms

a(0) =338635a(1) =187090a(2) =225179a(3) =245916a(4) =256100a(5) =261192a(6) =264100a(7) =326973a(8) =430055a(9) =553586a(10) =686661a(11) =824129a(12) =963797a(13) =1165618a(14) =1469816a(15) =1896847a(16) =2456254a(17) =3152394a(18) =3987498a(19) =5023727a(20) =6363433a(21) =8129436a(22) =10454151