Number of (n+2) X 5 0..1 matrices with each 3 X 3 subblock idempotent.

Terms

a(0) =113a(1) =133a(2) =180a(3) =230a(4) =320a(5) =451a(6) =620a(7) =866a(8) =1229a(9) =1746a(10) =2493a(11) =3586a(12) =5178a(13) =7498a(14) =10891a(15) =15855a(16) =23117a(17) =33749a(18) =49321a(19) =72130a(20) =105545a(21) =154505a(22) =226246a(23) =331373a(24) =485430a(25) =711197a(26) =1042059a(27) =1526945a(28) =2237564a(29) =3279010