Number of 2 X n 0..1 arrays with every element both equal and not equal to some elements at offset (-1,-1) (-1,0) (-1,1) (0,-1) (0,1) or (1,0), with upper left element zero.

A278281

Number of 2 X n 0..1 arrays with every element both equal and not equal to some elements at offset (-1,-1) (-1,0) (-1,1) (0,-1) (0,1) or (1,0), with upper left element zero.

Terms

    a(0) =0a(1) =2a(2) =4a(3) =13a(4) =36a(5) =109a(6) =317a(7) =938a(8) =2754a(9) =8114a(10) =23869a(11) =70264a(12) =206775a(13) =608587a(14) =1791104a(15) =5271458a(16) =15514416a(17) =45660689a(18) =134384272a(19) =395507653a(20) =1164021849a(21) =3425843074a(22) =10082628314a(23) =29674271654a(24) =87334607025a(25) =257035243772a(26) =756482665279

External references