Number of (n+6)X11 0..1 matrices with each 7X7 subblock idempotent.

Terms

a(0) =128620a(1) =26542a(2) =26294a(3) =28783a(4) =31062a(5) =32814a(6) =34107a(7) =35087a(8) =40536a(9) =50460a(10) =63767a(11) =79415a(12) =96623a(13) =114896a(14) =133880a(15) =158108a(16) =191982a(17) =238919a(18) =301266a(19) =380584a(20) =477886a(21) =593959a(22) =733990a(23) =907647a(24) =1127983a(25) =1410421a(26) =1771896a(27) =2230456a(28) =2804799a(29) =3518917