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

A297883

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

Terms

    a(0) =2a(1) =7a(2) =13a(3) =29a(4) =69a(5) =137a(6) =301a(7) =705a(8) =1461a(9) =3193a(10) =7373a(11) =15729a(12) =34405a(13) =78569a(14) =170813a(15) =374945a(16) =849493a(17) =1868953a(18) =4119725a(19) =9284817a(20) =20576325a(21) =45534025a(22) =102285085a(23) =227659265a(24) =505431861a(25) =1133187833a(26) =2528544397a(27) =5627807793a(28) =12604474149a(29) =28165860265

External references