Number of 5 X 5 0..n matrices with each 2 X 2 subblock idempotent.

Terms

a(0) =196a(1) =260a(2) =332a(3) =412a(4) =500a(5) =596a(6) =700a(7) =812a(8) =932a(9) =1060a(10) =1196a(11) =1340a(12) =1492a(13) =1652a(14) =1820a(15) =1996a(16) =2180a(17) =2372a(18) =2572a(19) =2780a(20) =2996a(21) =3220a(22) =3452a(23) =3692a(24) =3940a(25) =4196a(26) =4460a(27) =4732a(28) =5012a(29) =5300