Number of nX4 0..1 arrays with every element equal to 3, 5, 6, 7 or 8 king-move adjacent elements, with upper left element zero.

A298959

Number of nX4 0..1 arrays with every element equal to 3, 5, 6, 7 or 8 king-move adjacent elements, with upper left element zero.

Terms

    a(0) =0a(1) =2a(2) =2a(3) =7a(4) =14a(5) =34a(6) =75a(7) =174a(8) =396a(9) =907a(10) =2070a(11) =4734a(12) =10819a(13) =24730a(14) =56520a(15) =129187a(16) =295274a(17) =674890a(18) =1542547a(19) =3525702a(20) =8058468a(21) =18418715a(22) =42098446a(23) =96221670a(24) =219927587a(25) =502674114a(26) =1148929360a(27) =2626032755a(28) =6002151458a(29) =13718725330

External references