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

Terms

a(0) =96608a(1) =5668a(2) =5896a(3) =7394a(4) =8880a(5) =10086a(6) =11032a(7) =14984a(8) =21920a(9) =31362a(10) =42844a(11) =55982a(12) =70502a(13) =90452a(14) =119436a(15) =160548a(16) =216352a(17) =288968a(18) =380246a(19) =497284a(20) =651438a(21) =857836a(22) =1134708a(23) =1502902a(24) =1985666a(25) =2615240