Number of paths from (0,0) to (n+2,n) using only up and right steps and avoiding two or more consecutive moves up or three or more consecutive moves right.

A177787

Number of paths from (0,0) to (n+2,n) using only up and right steps and avoiding two or more consecutive moves up or three or more consecutive moves right.

Terms

    a(0) =2a(1) =5a(2) =10a(3) =18a(4) =30a(5) =47a(6) =70a(7) =100a(8) =138a(9) =185a(10) =242a(11) =310a(12) =390a(13) =483a(14) =590a(15) =712a(16) =850a(17) =1005a(18) =1178a(19) =1370a(20) =1582a(21) =1815a(22) =2070a(23) =2348a(24) =2650a(25) =2977a(26) =3330a(27) =3710a(28) =4118a(29) =4555

External references