Number of nX7 0..1 arrays with every element unequal to 0, 1, 3 or 4 king-move adjacent elements, with upper left element zero.

A303807

Number of nX7 0..1 arrays with every element unequal to 0, 1, 3 or 4 king-move adjacent elements, with upper left element zero.

Terms

    a(0) =21a(1) =127a(2) =83a(3) =202a(4) =291a(5) =597a(6) =1217a(7) =2767a(8) =6147a(9) =14940a(10) =34846a(11) =84947a(12) =210191a(13) =538910a(14) =1368999a(15) =3502960a(16) =8990885a(17) =23400795a(18) =61220178a(19) =160733766a(20) =422311782a(21) =1114702509a(22) =2954914697a(23) =7862464520a(24) =20960436098a(25) =55991586940a(26) =149902307803

External references