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

Terms

a(0) =2185738a(1) =164935a(2) =125525a(3) =122508a(4) =128620a(5) =138581a(6) =146715a(7) =156428a(8) =171787a(9) =199628a(10) =251449a(11) =337387a(12) =463685a(13) =642049a(14) =872565a(15) =1156493a(16) =1513357a(17) =1983382a(18) =2631002a(19) =3556586a(20) =4890506a(21) =6786490a(22) =9424850a(23) =13019794a(24) =17851883a(25) =24336233a(26) =33091332