Number of (n+4)X6 0..1 matrices with each 5X5 subblock idempotent.

Terms

a(0) =2351a(1) =1312a(2) =1494a(3) =1720a(4) =1938a(5) =2110a(6) =2591a(7) =3332a(8) =4377a(9) =5599a(10) =6968a(11) =8749a(12) =11314a(13) =14818a(14) =19530a(15) =25558a(16) =33366a(17) =43649a(18) =57438a(19) =75842a(20) =100289a(21) =132470a(22) =174892a(23) =231022a(24) =305587a(25) =404481a(26) =535530a(27) =708936a(28) =938459a(29) =1242445