Number of nX4 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 2,0,4,1,3 for x=0,1,2,3,4.

A196310

Number of nX4 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 2,0,4,1,3 for x=0,1,2,3,4.

Terms

    a(0) =5a(1) =17a(2) =50a(3) =335a(4) =866a(5) =2942a(6) =13277a(7) =56237a(8) =228881a(9) =862148a(10) =3323631a(11) =13251496a(12) =53662892a(13) =215087507a(14) =848846709a(15) =3350015319a(16) =13308176712a(17) =53085757815a(18) =211514954392a(19) =840367835992

External references