Number of nX3 0..1 arrays with every element unequal to 0, 1, 2, 5 or 6 king-move adjacent elements, with upper left element zero.

A304599

Number of nX3 0..1 arrays with every element unequal to 0, 1, 2, 5 or 6 king-move adjacent elements, with upper left element zero.

Terms

    a(0) =4a(1) =5a(2) =13a(3) =23a(4) =53a(5) =131a(6) =330a(7) =793a(8) =1930a(9) =4765a(10) =11686a(11) =28627a(12) =70237a(13) =172374a(14) =422930a(15) =1037573a(16) =2545757a(17) =6246392a(18) =15325889a(19) =37602947a(20) =92261907a(21) =226372036a(22) =555420895a(23) =1362767425a(24) =3343655704a(25) =8203918429a(26) =20128946224a(27) =49387923264a(28) =121177087505

External references