Number of n X 2 binary arrays with all 1s connected, a path of 1s from left column to right column, and no 1 having more than two 1s adjacent.

A163723

Number of n X 2 binary arrays with all 1s connected, a path of 1s from left column to right column, and no 1 having more than two 1s adjacent.

Terms

    a(0) =1a(1) =7a(2) =21a(3) =49a(4) =101a(5) =193a(6) =351a(7) =617a(8) =1059a(9) =1787a(10) =2979a(11) =4923a(12) =8085a(13) =13219a(14) =21545a(15) =35037a(16) =56889a(17) =92269a(18) =149539a(19) =242229a(20) =392231a(21) =634967a(22) =1027751a(23) =1663319a(24) =2691721a(25) =4355743a(26) =7048221a(27) =11404777a(28) =18453869a(29) =29859577

External references