Number of nX6 0..1 arrays with every element equal to 0, 1 or 4 horizontally or vertically adjacent elements, with upper left element zero.

A301660

Number of nX6 0..1 arrays with every element equal to 0, 1 or 4 horizontally or vertically adjacent elements, with upper left element zero.

Terms

    a(0) =13a(1) =14a(2) =26a(3) =45a(4) =99a(5) =254a(6) =696a(7) =2013a(8) =5953a(9) =17878a(10) =54126a(11) =164525a(12) =501455a(13) =1530694a(14) =4676360a(15) =14293737a(16) =43703389a(17) =133647942a(18) =408746766a(19) =1250182369a(20) =3823920719a(21) =11696450282a(22) =35777089740a(23) =109435800649a(24) =334746407201

External references