Number of nX3 0..1 arrays with every element equal to 0, 1, 3 or 4 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.
A302304
Number of nX3 0..1 arrays with every element equal to 0, 1, 3 or 4 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.
Terms
- a(0) =3a(1) =11a(2) =13a(3) =33a(4) =58a(5) =153a(6) =336a(7) =937a(8) =2449a(9) =6560a(10) =18488a(11) =52053a(12) =147896a(13) =425764a(14) =1229112a(15) =3561761a(16) =10353391a(17) =30135225a(18) =87835075a(19) =256217794a(20) =747737289a(21) =2183170380a(22) =6375689391a(23) =18622164403a(24) =54399493814a(25) =158924553086a(26) =464309179701
External references
- oeis: A302304