Number of 6Xn 0..1 arrays with every element equal to 0, 1 or 4 horizontally or antidiagonally adjacent elements, with upper left element zero.

A301968

Number of 6Xn 0..1 arrays with every element equal to 0, 1 or 4 horizontally or antidiagonally adjacent elements, with upper left element zero.

Terms

    a(0) =32a(1) =233a(2) =252a(3) =441a(4) =874a(5) =2544a(6) =7795a(7) =22456a(8) =66659a(9) =203926a(10) =621905a(11) =1891815a(12) =5775564a(13) =17661198a(14) =53992136a(15) =165070762a(16) =504836902a(17) =1544110348a(18) =4722844581a(19) =14445769443a(20) =44186654928a(21) =135159112990a(22) =413428628386

External references