Number of lattice paths from (0,0) to (i,n-2*i) that do not go above the diagonal x=y using steps in {(1,0), (0,1)}.
A357654
Number of lattice paths from (0,0) to (i,n-2*i) that do not go above the diagonal x=y using steps in {(1,0), (0,1)}.
Terms
- a(0) =1a(1) =0a(2) =1a(3) =1a(4) =1a(5) =2a(6) =3a(7) =3a(8) =6a(9) =9a(10) =10a(11) =19a(12) =29a(13) =34a(14) =63a(15) =97a(16) =118a(17) =215a(18) =333a(19) =416a(20) =749a(21) =1165a(22) =1485a(23) =2650a(24) =4135a(25) =5355a(26) =9490a(27) =14845a(28) =19473a(29) =34318
External references
- oeis: A357654