Number of nX3 0..1 arrays with every element equal to 0, 1, 2, 4 or 6 king-move adjacent elements, with upper left element zero.

A298289

Number of nX3 0..1 arrays with every element equal to 0, 1, 2, 4 or 6 king-move adjacent elements, with upper left element zero.

Terms

    a(0) =4a(1) =13a(2) =20a(3) =26a(4) =43a(5) =72a(6) =115a(7) =189a(8) =318a(9) =526a(10) =874a(11) =1473a(12) =2482a(13) =4185a(14) =7085a(15) =12032a(16) =20448a(17) =34806a(18) =59371a(19) =101370a(20) =173225a(21) =296379a(22) =507516a(23) =869590a(24) =1491114a(25) =2558507a(26) =4392128a(27) =7543859a(28) =12963607a(29) =22286228

External references