Number of 4Xn 0..1 arrays with every element equal to 0, 1, 4 or 5 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.

A302517

Number of 4Xn 0..1 arrays with every element equal to 0, 1, 4 or 5 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.

Terms

    a(0) =8a(1) =6a(2) =9a(3) =28a(4) =36a(5) =80a(6) =235a(7) =541a(8) =1115a(9) =2554a(10) =6095a(11) =13920a(12) =31216a(13) =71431a(14) =164589a(15) =375943a(16) =856294a(17) =1957963a(18) =4481840a(19) =10241792a(20) =23394379a(21) =53477141a(22) =122262891a(23) =279435298a(24) =638618663a(25) =1459697640a(26) =3336520448a(27) =7626024455a(28) =17430072821a(29) =39839300103

External references