Number of 3 X n 0..1 arrays with every element equal to 1, 2 or 4 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.

A302280

Number of 3 X n 0..1 arrays with every element equal to 1, 2 or 4 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.

Terms

    a(0) =0a(1) =10a(2) =22a(3) =29a(4) =74a(5) =162a(6) =363a(7) =782a(8) =1766a(9) =3953a(10) =8784a(11) =19606a(12) =43887a(13) =98136a(14) =219234a(15) =490655a(16) =1098086a(17) =2457684a(18) =5502261a(19) =12323540a(20) =27604374a(21) =61847407a(22) =138600898a(23) =310664178a(24) =696450255a(25) =1561597724a(26) =3502013800a(27) =7854708637a(28) =17619975144

External references