Number of n X 2 0..1 arrays with every element equal to 0, 2, 3 or 6 king-move adjacent elements, with upper left element zero.

A297980

Number of n X 2 0..1 arrays with every element equal to 0, 2, 3 or 6 king-move adjacent elements, with upper left element zero.

Terms

    a(0) =1a(1) =5a(2) =6a(3) =17a(4) =24a(5) =53a(6) =94a(7) =173a(8) =340a(9) =601a(10) =1178a(11) =2137a(12) =4056a(13) =7565a(14) =14086a(15) =26533a(16) =49276a(17) =92641a(18) =172722a(19) =323409a(20) =604896a(21) =1130389a(22) =2116062a(23) =3954141a(24) =7399172a(25) =13833769a(26) =25873674a(27) =48391369a(28) =90490216a(29) =169253917

External references