Number of (n+6)X10 0..1 matrices with each 7X7 subblock idempotent.

Terms

a(0) =122508a(1) =24643a(2) =24293a(3) =26528a(4) =28783a(5) =30456a(6) =31741a(7) =32736a(8) =38059a(9) =47654a(10) =60745a(11) =76148a(12) =93083a(13) =111033a(14) =129756a(15) =153513a(16) =186786a(17) =232806a(18) =294033a(19) =371986a(20) =467644a(21) =581659a(22) =719363a(23) =890061a(24) =1106560a(25) =1384000a(26) =1739159a(27) =2189675a(28) =2754115a(29) =3455903