Number of nX4 0..1 arrays with every element equal to 0, 1 or 3 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.

A302159

Number of nX4 0..1 arrays with every element equal to 0, 1 or 3 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.

Terms

    a(0) =5a(1) =17a(2) =12a(3) =29a(4) =73a(5) =156a(6) =361a(7) =865a(8) =1970a(9) =4530a(10) =10571a(11) =24394a(12) =56204a(13) =130230a(14) =301221a(15) =695541a(16) =1608549a(17) =3720177a(18) =8597848a(19) =19876759a(20) =45959426a(21) =106246321a(22) =245619039a(23) =567865144a(24) =1312830532a(25) =3035049693a(26) =7016724012a(27) =16221856134a(28) =37502724170

External references