Number of 4 X n 0..1 arrays with every element equal to 0, 1, 3 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.

A302637

Number of 4 X n 0..1 arrays with every element equal to 0, 1, 3 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.

Terms

    a(0) =8a(1) =10a(2) =19a(3) =33a(4) =65a(5) =149a(6) =304a(7) =643a(8) =1343a(9) =2880a(10) =6038a(11) =12805a(12) =27015a(13) =57283a(14) =120917a(15) =255898a(16) =540904a(17) =1144495a(18) =2419416a(19) =5117330a(20) =10820901a(21) =22886110a(22) =48394996a(23) =102347752a(24) =216437366a(25) =457724270a(26) =967964774a(27) =2047035882a(28) =4328987213

External references