Number of nX3 0..1 arrays with every element equal to 2 or 3 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.

A300367

Number of nX3 0..1 arrays with every element equal to 2 or 3 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.

Terms

    a(0) =0a(1) =1a(2) =0a(3) =3a(4) =3a(5) =8a(6) =16a(7) =32a(8) =70a(9) =135a(10) =293a(11) =585a(12) =1221a(13) =2496a(14) =5156a(15) =10609a(16) =21818a(17) =44955a(18) =92476a(19) =190459a(20) =391929a(21) =806935a(22) =1660946a(23) =3419147a(24) =7038323a(25) =14488296a(26) =29824518a(27) =61393333a(28) =126379174a(29) =260151058

External references