Number of (n+3) X 7 0..2 matrices with each 4 X 4 subblock idempotent.

Terms

a(0) =3506a(1) =2863a(2) =3502a(3) =3924a(4) =4209a(5) =5371a(6) =7132a(7) =9238a(8) =11551a(9) =14945a(10) =20018a(11) =27116a(12) =36445a(13) =49083a(14) =66708a(15) =91346a(16) =125227a(17) =171657a(18) =235622a(19) =324136a(20) =446441a(21) =615083a(22) =847596a(23) =1168530a(24) =1611675a(25) =2223365a(26) =3067470a(27) =4232412a(28) =5840401a(29) =8059979