Number of (n+3) X 10 0..2 matrices with each 4 X 4 subblock idempotent.

Terms

a(0) =8117a(1) =5711a(2) =6540a(3) =7132a(4) =7575a(5) =9090a(6) =11268a(7) =13821a(8) =16593a(9) =20653a(10) =26657a(11) =34977a(12) =45825a(13) =60486a(14) =80897a(15) =109371a(16) =148429a(17) =201881a(18) =275470a(19) =377256a(20) =517816a(21) =711541a(22) =978561a(23) =1347070a(24) =1855835a(25) =2558018a(26) =3526907a(27) =4863988a(28) =6709510a(29) =9256888