Number of lattice paths from (0,0) to (n,n) using Euclid's orchard as a step-set.

A308087

Number of lattice paths from (0,0) to (n,n) using Euclid's orchard as a step-set.

Terms

    a(0) =1a(1) =1a(2) =1a(3) =3a(4) =13a(5) =45a(6) =153a(7) =515a(8) =1767a(9) =6167a(10) =21697a(11) =76661a(12) =271973a(13) =968561a(14) =3460677a(15) =12399661a(16) =44534647a(17) =160285049a(18) =577949447a(19) =2087375443a(20) =7550053527a(21) =27344761057a(22) =99155777619a(23) =359943568005

External references