Number of nX7 0..1 arrays with every element unequal to 2 or 3 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.

A317740

Number of nX7 0..1 arrays with every element unequal to 2 or 3 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.

Terms

    a(0) =0a(1) =22a(2) =6a(3) =35a(4) =74a(5) =36a(6) =274a(7) =280a(8) =1065a(9) =1939a(10) =5947a(11) =13101a(12) =35847a(13) =83062a(14) =222994a(15) =537669a(16) =1395855a(17) =3480819a(18) =8943072a(19) =22421261a(20) =57460156a(21) =144954058a(22) =369414113a(23) =936279738a(24) =2382817938a(25) =6046949393a(26) =15383924113a(27) =39073108671a(28) =99355550907a(29) =252459496924

External references