Number of (n+5)X12 0..1 matrices with each 6X6 subblock idempotent.

Terms

a(0) =28708a(1) =7843a(2) =8294a(3) =9164a(4) =9946a(5) =10561a(6) =11032a(7) =12921a(8) =16072a(9) =20202a(10) =25024a(11) =30332a(12) =35979a(13) =43392a(14) =53814a(15) =68241a(16) =87358a(17) =111648a(18) =141447a(19) =178530a(20) =225887a(21) =287540a(22) =368172a(23) =472953a(24) =607389a(25) =778773a(26) =997360a(27) =1277463a(28) =1638054a(29) =2103279