Number of n X 2 0..1 arrays with every element equal to 1, 3, 4 or 6 king-move adjacent elements, with upper left element zero.

A298057

Number of n X 2 0..1 arrays with every element equal to 1, 3, 4 or 6 king-move adjacent elements, with upper left element zero.

Terms

    a(0) =1a(1) =4a(2) =3a(3) =13a(4) =32a(5) =53a(6) =125a(7) =386a(8) =727a(9) =1601a(10) =4568a(11) =9985a(12) =21185a(13) =56082a(14) =131531a(15) =284005a(16) =704432a(17) =1701725a(18) =3780885a(19) =9013570a(20) =21864175a(21) =49853913a(22) =116599048a(23) =280872201a(24) =652085433a(25) =1515923218a(26) =3617323651a(27) =8484345565a(28) =19735099744a(29) =46724667589

External references