Number of nX3 0..1 arrays with every element unequal to 0, 1, 2, 4, 6 or 7 king-move adjacent elements, with upper left element zero.

A306055

Number of nX3 0..1 arrays with every element unequal to 0, 1, 2, 4, 6 or 7 king-move adjacent elements, with upper left element zero.

Terms

    a(0) =4a(1) =12a(2) =27a(3) =58a(4) =189a(5) =526a(6) =1344a(7) =3772a(8) =10515a(9) =28556a(10) =78229a(11) =215789a(12) =592845a(13) =1625872a(14) =4467698a(15) =12281228a(16) =33730035a(17) =92646767a(18) =254564003a(19) =699373287a(20) =1921217868a(21) =5278121739a(22) =14500765607a(23) =39837021249a(24) =109441946346a(25) =300667702619

External references