Number of (n+6)X12 0..1 matrices with each 7X7 subblock idempotent.

Terms

a(0) =138581a(1) =27611a(2) =27945a(3) =30456a(4) =32814a(5) =34588a(6) =35891a(7) =36872a(8) =42492a(9) =52620a(10) =66173a(11) =82088a(12) =99582a(13) =118129a(14) =137408a(15) =162051a(16) =196571a(17) =244386a(18) =307863a(19) =388574a(20) =487577a(21) =605597a(22) =748003a(23) =924665a(24) =1148883a(25) =1436312a(26) =1804191a(27) =2270805a(28) =2855176a(29) =3581683