Number of n X 5 0..1 arrays with every element unequal to 0, 1, 4 or 6 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.

A318542

Number of n X 5 0..1 arrays with every element unequal to 0, 1, 4 or 6 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.

Terms

    a(0) =8a(1) =8a(2) =26a(3) =78a(4) =247a(5) =784a(6) =2349a(7) =7191a(8) =22268a(9) =68384a(10) =210050a(11) =645832a(12) =1985105a(13) =6102355a(14) =18758291a(15) =57660242a(16) =177244228a(17) =544835790a(18) =1674781291a(19) =5148145759a(20) =15824995614a(21) =48644815851a(22) =149530340549a(23) =459644547764

External references