Number of nX3 0..1 arrays with each 1 adjacent to 3, 4 or 5 king-move neighboring 1s.

A296985

Number of nX3 0..1 arrays with each 1 adjacent to 3, 4 or 5 king-move neighboring 1s.

Terms

    a(0) =1a(1) =4a(2) =14a(3) =28a(4) =98a(5) =447a(6) =1653a(7) =6507a(8) =27374a(9) =111866a(10) =455776a(11) =1879650a(12) =7732294a(13) =31739780a(14) =130516126a(15) =536728543a(16) =2206092839a(17) =9069307066a(18) =37287485232a(19) =153290332616a(20) =630187059733

External references