Number of nX3 0..1 arrays with every element unequal to 0, 1, 3 or 5 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.

A318077

Number of nX3 0..1 arrays with every element unequal to 0, 1, 3 or 5 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.

Terms

    a(0) =3a(1) =4a(2) =5a(3) =11a(4) =18a(5) =32a(6) =54a(7) =98a(8) =173a(9) =315a(10) =559a(11) =1008a(12) =1813a(13) =3290a(14) =5928a(15) =10716a(16) =19352a(17) =35036a(18) =63355a(19) =114651a(20) =207352a(21) =375184a(22) =678789a(23) =1228507a(24) =2222990a(25) =4022469a(26) =7278193a(27) =13171060a(28) =23835243a(29) =43132890

External references