Number of nX3 0..1 arrays with every element equal to 1, 2 or 3 king-move adjacent elements, with upper left element zero.

A297818

Number of nX3 0..1 arrays with every element equal to 1, 2 or 3 king-move adjacent elements, with upper left element zero.

Terms

    a(0) =1a(1) =17a(2) =48a(3) =146a(4) =399a(5) =1114a(6) =3124a(7) =8861a(8) =25130a(9) =71196a(10) =201467a(11) =570100a(12) =1613454a(13) =4566805a(14) =12926144a(15) =36586306a(16) =103553095a(17) =293094410a(18) =829569532a(19) =2348002541a(20) =6645755138a(21) =18810052924a(22) =53239705819a(23) =150688904948a(24) =426507740022

External references