Number of n X 2 0..1 arrays with each 1 adjacent to 1 or 2 king-move neighboring 1s.

A295841

Number of n X 2 0..1 arrays with each 1 adjacent to 1 or 2 king-move neighboring 1s.

Terms

    a(0) =2a(1) =11a(2) =29a(3) =80a(4) =261a(5) =789a(6) =2354a(7) =7199a(8) =21889a(9) =66280a(10) =201313a(11) =611401a(12) =1855458a(13) =5632611a(14) =17100277a(15) =51909760a(16) =157581005a(17) =478374029a(18) =1452197426a(19) =4408426199a(20) =13382677305a(21) =40625798040a(22) =123327694601a(23) =374385940001

External references